added make browserlist(autoprefixer) work fixed

24 files changed, 3303 insertions, 0 deletions

diff --git a/node_modules/webpack-sources/lib/CachedSource.js b/node_modules/webpack-sources/lib/CachedSource.js
new file mode 100644
index 00000000..5fc2d4c9
--- /dev/null
+++ b/node_modules/webpack-sources/lib/CachedSource.js
@@ -0,0 +1,274 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+const streamChunksOfSourceMap = require("./helpers/streamChunksOfSourceMap");
+const streamChunksOfRawSource = require("./helpers/streamChunksOfRawSource");
+const streamAndGetSourceAndMap = require("./helpers/streamAndGetSourceAndMap");
+
+const mapToBufferedMap = map => {
+	if (typeof map !== "object" || !map) return map;
+	const bufferedMap = Object.assign({}, map);
+	if (map.mappings) {
+		bufferedMap.mappings = Buffer.from(map.mappings, "utf-8");
+	}
+	if (map.sourcesContent) {
+		bufferedMap.sourcesContent = map.sourcesContent.map(
+			str => str && Buffer.from(str, "utf-8")
+		);
+	}
+	return bufferedMap;
+};
+
+const bufferedMapToMap = bufferedMap => {
+	if (typeof bufferedMap !== "object" || !bufferedMap) return bufferedMap;
+	const map = Object.assign({}, bufferedMap);
+	if (bufferedMap.mappings) {
+		map.mappings = bufferedMap.mappings.toString("utf-8");
+	}
+	if (bufferedMap.sourcesContent) {
+		map.sourcesContent = bufferedMap.sourcesContent.map(
+			buffer => buffer && buffer.toString("utf-8")
+		);
+	}
+	return map;
+};
+
+class CachedSource extends Source {
+	constructor(source, cachedData) {
+		super();
+		this._source = source;
+		this._cachedSourceType = cachedData ? cachedData.source : undefined;
+		this._cachedSource = undefined;
+		this._cachedBuffer = cachedData ? cachedData.buffer : undefined;
+		this._cachedSize = cachedData ? cachedData.size : undefined;
+		this._cachedMaps = cachedData ? cachedData.maps : new Map();
+		this._cachedHashUpdate = cachedData ? cachedData.hash : undefined;
+	}
+
+	getCachedData() {
+		const bufferedMaps = new Map();
+		for (const pair of this._cachedMaps) {
+			let cacheEntry = pair[1];
+			if (cacheEntry.bufferedMap === undefined) {
+				cacheEntry.bufferedMap = mapToBufferedMap(
+					this._getMapFromCacheEntry(cacheEntry)
+				);
+			}
+			bufferedMaps.set(pair[0], {
+				map: undefined,
+				bufferedMap: cacheEntry.bufferedMap
+			});
+		}
+		// We don't want to cache strings
+		// So if we have a caches sources
+		// create a buffer from it and only store
+		// if it was a Buffer or string
+		if (this._cachedSource) {
+			this.buffer();
+		}
+		return {
+			buffer: this._cachedBuffer,
+			source:
+				this._cachedSourceType !== undefined
+					? this._cachedSourceType
+					: typeof this._cachedSource === "string"
+					? true
+					: Buffer.isBuffer(this._cachedSource)
+					? false
+					: undefined,
+			size: this._cachedSize,
+			maps: bufferedMaps,
+			hash: this._cachedHashUpdate
+		};
+	}
+
+	originalLazy() {
+		return this._source;
+	}
+
+	original() {
+		if (typeof this._source === "function") this._source = this._source();
+		return this._source;
+	}
+
+	source() {
+		const source = this._getCachedSource();
+		if (source !== undefined) return source;
+		return (this._cachedSource = this.original().source());
+	}
+
+	_getMapFromCacheEntry(cacheEntry) {
+		if (cacheEntry.map !== undefined) {
+			return cacheEntry.map;
+		} else if (cacheEntry.bufferedMap !== undefined) {
+			return (cacheEntry.map = bufferedMapToMap(cacheEntry.bufferedMap));
+		}
+	}
+
+	_getCachedSource() {
+		if (this._cachedSource !== undefined) return this._cachedSource;
+		if (this._cachedBuffer && this._cachedSourceType !== undefined) {
+			return (this._cachedSource = this._cachedSourceType
+				? this._cachedBuffer.toString("utf-8")
+				: this._cachedBuffer);
+		}
+	}
+
+	buffer() {
+		if (this._cachedBuffer !== undefined) return this._cachedBuffer;
+		if (this._cachedSource !== undefined) {
+			if (Buffer.isBuffer(this._cachedSource)) {
+				return (this._cachedBuffer = this._cachedSource);
+			}
+			return (this._cachedBuffer = Buffer.from(this._cachedSource, "utf-8"));
+		}
+		if (typeof this.original().buffer === "function") {
+			return (this._cachedBuffer = this.original().buffer());
+		}
+		const bufferOrString = this.source();
+		if (Buffer.isBuffer(bufferOrString)) {
+			return (this._cachedBuffer = bufferOrString);
+		}
+		return (this._cachedBuffer = Buffer.from(bufferOrString, "utf-8"));
+	}
+
+	size() {
+		if (this._cachedSize !== undefined) return this._cachedSize;
+		if (this._cachedBuffer !== undefined) {
+			return (this._cachedSize = this._cachedBuffer.length);
+		}
+		const source = this._getCachedSource();
+		if (source !== undefined) {
+			return (this._cachedSize = Buffer.byteLength(source));
+		}
+		return (this._cachedSize = this.original().size());
+	}
+
+	sourceAndMap(options) {
+		const key = options ? JSON.stringify(options) : "{}";
+		const cacheEntry = this._cachedMaps.get(key);
+		// Look for a cached map
+		if (cacheEntry !== undefined) {
+			// We have a cached map in some representation
+			const map = this._getMapFromCacheEntry(cacheEntry);
+			// Either get the cached source or compute it
+			return { source: this.source(), map };
+		}
+		// Look for a cached source
+		let source = this._getCachedSource();
+		// Compute the map
+		let map;
+		if (source !== undefined) {
+			map = this.original().map(options);
+		} else {
+			// Compute the source and map together.
+			const sourceAndMap = this.original().sourceAndMap(options);
+			source = sourceAndMap.source;
+			map = sourceAndMap.map;
+			this._cachedSource = source;
+		}
+		this._cachedMaps.set(key, {
+			map,
+			bufferedMap: undefined
+		});
+		return { source, map };
+	}
+
+	streamChunks(options, onChunk, onSource, onName) {
+		const key = options ? JSON.stringify(options) : "{}";
+		if (
+			this._cachedMaps.has(key) &&
+			(this._cachedBuffer !== undefined || this._cachedSource !== undefined)
+		) {
+			const { source, map } = this.sourceAndMap(options);
+			if (map) {
+				return streamChunksOfSourceMap(
+					source,
+					map,
+					onChunk,
+					onSource,
+					onName,
+					!!(options && options.finalSource),
+					true
+				);
+			} else {
+				return streamChunksOfRawSource(
+					source,
+					onChunk,
+					onSource,
+					onName,
+					!!(options && options.finalSource)
+				);
+			}
+		}
+		const { result, source, map } = streamAndGetSourceAndMap(
+			this.original(),
+			options,
+			onChunk,
+			onSource,
+			onName
+		);
+		this._cachedSource = source;
+		this._cachedMaps.set(key, {
+			map,
+			bufferedMap: undefined
+		});
+		return result;
+	}
+
+	map(options) {
+		const key = options ? JSON.stringify(options) : "{}";
+		const cacheEntry = this._cachedMaps.get(key);
+		if (cacheEntry !== undefined) {
+			return this._getMapFromCacheEntry(cacheEntry);
+		}
+		const map = this.original().map(options);
+		this._cachedMaps.set(key, {
+			map,
+			bufferedMap: undefined
+		});
+		return map;
+	}
+
+	updateHash(hash) {
+		if (this._cachedHashUpdate !== undefined) {
+			for (const item of this._cachedHashUpdate) hash.update(item);
+			return;
+		}
+		const update = [];
+		let currentString = undefined;
+		const tracker = {
+			update: item => {
+				if (typeof item === "string" && item.length < 10240) {
+					if (currentString === undefined) {
+						currentString = item;
+					} else {
+						currentString += item;
+						if (currentString.length > 102400) {
+							update.push(Buffer.from(currentString));
+							currentString = undefined;
+						}
+					}
+				} else {
+					if (currentString !== undefined) {
+						update.push(Buffer.from(currentString));
+						currentString = undefined;
+					}
+					update.push(item);
+				}
+			}
+		};
+		this.original().updateHash(tracker);
+		if (currentString !== undefined) {
+			update.push(Buffer.from(currentString));
+		}
+		for (const item of update) hash.update(item);
+		this._cachedHashUpdate = update;
+	}
+}
+
+module.exports = CachedSource;
diff --git a/node_modules/webpack-sources/lib/CompatSource.js b/node_modules/webpack-sources/lib/CompatSource.js
new file mode 100644
index 00000000..0b9d9bdb
--- /dev/null
+++ b/node_modules/webpack-sources/lib/CompatSource.js
@@ -0,0 +1,66 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+
+class CompatSource extends Source {
+	static from(sourceLike) {
+		return sourceLike instanceof Source
+			? sourceLike
+			: new CompatSource(sourceLike);
+	}
+
+	constructor(sourceLike) {
+		super();
+		this._sourceLike = sourceLike;
+	}
+
+	source() {
+		return this._sourceLike.source();
+	}
+
+	buffer() {
+		if (typeof this._sourceLike.buffer === "function") {
+			return this._sourceLike.buffer();
+		}
+		return super.buffer();
+	}
+
+	size() {
+		if (typeof this._sourceLike.size === "function") {
+			return this._sourceLike.size();
+		}
+		return super.size();
+	}
+
+	map(options) {
+		if (typeof this._sourceLike.map === "function") {
+			return this._sourceLike.map(options);
+		}
+		return super.map(options);
+	}
+
+	sourceAndMap(options) {
+		if (typeof this._sourceLike.sourceAndMap === "function") {
+			return this._sourceLike.sourceAndMap(options);
+		}
+		return super.sourceAndMap(options);
+	}
+
+	updateHash(hash) {
+		if (typeof this._sourceLike.updateHash === "function") {
+			return this._sourceLike.updateHash(hash);
+		}
+		if (typeof this._sourceLike.map === "function") {
+			throw new Error(
+				"A Source-like object with a 'map' method must also provide an 'updateHash' method"
+			);
+		}
+		hash.update(this.buffer());
+	}
+}
+
+module.exports = CompatSource;
diff --git a/node_modules/webpack-sources/lib/ConcatSource.js b/node_modules/webpack-sources/lib/ConcatSource.js
new file mode 100644
index 00000000..3c7e7f28
--- /dev/null
+++ b/node_modules/webpack-sources/lib/ConcatSource.js
@@ -0,0 +1,319 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+const RawSource = require("./RawSource");
+const streamChunks = require("./helpers/streamChunks");
+const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
+
+const stringsAsRawSources = new WeakSet();
+
+class ConcatSource extends Source {
+	constructor() {
+		super();
+		this._children = [];
+		for (let i = 0; i < arguments.length; i++) {
+			const item = arguments[i];
+			if (item instanceof ConcatSource) {
+				for (const child of item._children) {
+					this._children.push(child);
+				}
+			} else {
+				this._children.push(item);
+			}
+		}
+		this._isOptimized = arguments.length === 0;
+	}
+
+	getChildren() {
+		if (!this._isOptimized) this._optimize();
+		return this._children;
+	}
+
+	add(item) {
+		if (item instanceof ConcatSource) {
+			for (const child of item._children) {
+				this._children.push(child);
+			}
+		} else {
+			this._children.push(item);
+		}
+		this._isOptimized = false;
+	}
+
+	addAllSkipOptimizing(items) {
+		for (const item of items) {
+			this._children.push(item);
+		}
+	}
+
+	buffer() {
+		if (!this._isOptimized) this._optimize();
+		const buffers = [];
+		for (const child of this._children) {
+			if (typeof child.buffer === "function") {
+				buffers.push(child.buffer());
+			} else {
+				const bufferOrString = child.source();
+				if (Buffer.isBuffer(bufferOrString)) {
+					buffers.push(bufferOrString);
+				} else {
+					// This will not happen
+					buffers.push(Buffer.from(bufferOrString, "utf-8"));
+				}
+			}
+		}
+		return Buffer.concat(buffers);
+	}
+
+	source() {
+		if (!this._isOptimized) this._optimize();
+		let source = "";
+		for (const child of this._children) {
+			source += child.source();
+		}
+		return source;
+	}
+
+	size() {
+		if (!this._isOptimized) this._optimize();
+		let size = 0;
+		for (const child of this._children) {
+			size += child.size();
+		}
+		return size;
+	}
+
+	map(options) {
+		return getMap(this, options);
+	}
+
+	sourceAndMap(options) {
+		return getSourceAndMap(this, options);
+	}
+
+	streamChunks(options, onChunk, onSource, onName) {
+		if (!this._isOptimized) this._optimize();
+		if (this._children.length === 1)
+			return this._children[0].streamChunks(options, onChunk, onSource, onName);
+		let currentLineOffset = 0;
+		let currentColumnOffset = 0;
+		let sourceMapping = new Map();
+		let nameMapping = new Map();
+		const finalSource = !!(options && options.finalSource);
+		let code = "";
+		let needToCloseMapping = false;
+		for (const item of this._children) {
+			const sourceIndexMapping = [];
+			const nameIndexMapping = [];
+			let lastMappingLine = 0;
+			const { generatedLine, generatedColumn, source } = streamChunks(
+				item,
+				options,
+				// eslint-disable-next-line no-loop-func
+				(
+					chunk,
+					generatedLine,
+					generatedColumn,
+					sourceIndex,
+					originalLine,
+					originalColumn,
+					nameIndex
+				) => {
+					const line = generatedLine + currentLineOffset;
+					const column =
+						generatedLine === 1
+							? generatedColumn + currentColumnOffset
+							: generatedColumn;
+					if (needToCloseMapping) {
+						if (generatedLine !== 1 || generatedColumn !== 0) {
+							onChunk(
+								undefined,
+								currentLineOffset + 1,
+								currentColumnOffset,
+								-1,
+								-1,
+								-1,
+								-1
+							);
+						}
+						needToCloseMapping = false;
+					}
+					const resultSourceIndex =
+						sourceIndex < 0 || sourceIndex >= sourceIndexMapping.length
+							? -1
+							: sourceIndexMapping[sourceIndex];
+					const resultNameIndex =
+						nameIndex < 0 || nameIndex >= nameIndexMapping.length
+							? -1
+							: nameIndexMapping[nameIndex];
+					lastMappingLine = resultSourceIndex < 0 ? 0 : generatedLine;
+					if (finalSource) {
+						if (chunk !== undefined) code += chunk;
+						if (resultSourceIndex >= 0) {
+							onChunk(
+								undefined,
+								line,
+								column,
+								resultSourceIndex,
+								originalLine,
+								originalColumn,
+								resultNameIndex
+							);
+						}
+					} else {
+						if (resultSourceIndex < 0) {
+							onChunk(chunk, line, column, -1, -1, -1, -1);
+						} else {
+							onChunk(
+								chunk,
+								line,
+								column,
+								resultSourceIndex,
+								originalLine,
+								originalColumn,
+								resultNameIndex
+							);
+						}
+					}
+				},
+				(i, source, sourceContent) => {
+					let globalIndex = sourceMapping.get(source);
+					if (globalIndex === undefined) {
+						sourceMapping.set(source, (globalIndex = sourceMapping.size));
+						onSource(globalIndex, source, sourceContent);
+					}
+					sourceIndexMapping[i] = globalIndex;
+				},
+				(i, name) => {
+					let globalIndex = nameMapping.get(name);
+					if (globalIndex === undefined) {
+						nameMapping.set(name, (globalIndex = nameMapping.size));
+						onName(globalIndex, name);
+					}
+					nameIndexMapping[i] = globalIndex;
+				}
+			);
+			if (source !== undefined) code += source;
+			if (needToCloseMapping) {
+				if (generatedLine !== 1 || generatedColumn !== 0) {
+					onChunk(
+						undefined,
+						currentLineOffset + 1,
+						currentColumnOffset,
+						-1,
+						-1,
+						-1,
+						-1
+					);
+					needToCloseMapping = false;
+				}
+			}
+			if (generatedLine > 1) {
+				currentColumnOffset = generatedColumn;
+			} else {
+				currentColumnOffset += generatedColumn;
+			}
+			needToCloseMapping =
+				needToCloseMapping ||
+				(finalSource && lastMappingLine === generatedLine);
+			currentLineOffset += generatedLine - 1;
+		}
+		return {
+			generatedLine: currentLineOffset + 1,
+			generatedColumn: currentColumnOffset,
+			source: finalSource ? code : undefined
+		};
+	}
+
+	updateHash(hash) {
+		if (!this._isOptimized) this._optimize();
+		hash.update("ConcatSource");
+		for (const item of this._children) {
+			item.updateHash(hash);
+		}
+	}
+
+	_optimize() {
+		const newChildren = [];
+		let currentString = undefined;
+		let currentRawSources = undefined;
+		const addStringToRawSources = string => {
+			if (currentRawSources === undefined) {
+				currentRawSources = string;
+			} else if (Array.isArray(currentRawSources)) {
+				currentRawSources.push(string);
+			} else {
+				currentRawSources = [
+					typeof currentRawSources === "string"
+						? currentRawSources
+						: currentRawSources.source(),
+					string
+				];
+			}
+		};
+		const addSourceToRawSources = source => {
+			if (currentRawSources === undefined) {
+				currentRawSources = source;
+			} else if (Array.isArray(currentRawSources)) {
+				currentRawSources.push(source.source());
+			} else {
+				currentRawSources = [
+					typeof currentRawSources === "string"
+						? currentRawSources
+						: currentRawSources.source(),
+					source.source()
+				];
+			}
+		};
+		const mergeRawSources = () => {
+			if (Array.isArray(currentRawSources)) {
+				const rawSource = new RawSource(currentRawSources.join(""));
+				stringsAsRawSources.add(rawSource);
+				newChildren.push(rawSource);
+			} else if (typeof currentRawSources === "string") {
+				const rawSource = new RawSource(currentRawSources);
+				stringsAsRawSources.add(rawSource);
+				newChildren.push(rawSource);
+			} else {
+				newChildren.push(currentRawSources);
+			}
+		};
+		for (const child of this._children) {
+			if (typeof child === "string") {
+				if (currentString === undefined) {
+					currentString = child;
+				} else {
+					currentString += child;
+				}
+			} else {
+				if (currentString !== undefined) {
+					addStringToRawSources(currentString);
+					currentString = undefined;
+				}
+				if (stringsAsRawSources.has(child)) {
+					addSourceToRawSources(child);
+				} else {
+					if (currentRawSources !== undefined) {
+						mergeRawSources();
+						currentRawSources = undefined;
+					}
+					newChildren.push(child);
+				}
+			}
+		}
+		if (currentString !== undefined) {
+			addStringToRawSources(currentString);
+		}
+		if (currentRawSources !== undefined) {
+			mergeRawSources();
+		}
+		this._children = newChildren;
+		this._isOptimized = true;
+	}
+}
+
+module.exports = ConcatSource;
diff --git a/node_modules/webpack-sources/lib/OriginalSource.js b/node_modules/webpack-sources/lib/OriginalSource.js
new file mode 100644
index 00000000..59da29ab
--- /dev/null
+++ b/node_modules/webpack-sources/lib/OriginalSource.js
@@ -0,0 +1,135 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
+const splitIntoLines = require("./helpers/splitIntoLines");
+const getGeneratedSourceInfo = require("./helpers/getGeneratedSourceInfo");
+const Source = require("./Source");
+const splitIntoPotentialTokens = require("./helpers/splitIntoPotentialTokens");
+
+class OriginalSource extends Source {
+	constructor(value, name) {
+		super();
+		const isBuffer = Buffer.isBuffer(value);
+		this._value = isBuffer ? undefined : value;
+		this._valueAsBuffer = isBuffer ? value : undefined;
+		this._name = name;
+	}
+
+	getName() {
+		return this._name;
+	}
+
+	source() {
+		if (this._value === undefined) {
+			this._value = this._valueAsBuffer.toString("utf-8");
+		}
+		return this._value;
+	}
+
+	buffer() {
+		if (this._valueAsBuffer === undefined) {
+			this._valueAsBuffer = Buffer.from(this._value, "utf-8");
+		}
+		return this._valueAsBuffer;
+	}
+
+	map(options) {
+		return getMap(this, options);
+	}
+
+	sourceAndMap(options) {
+		return getSourceAndMap(this, options);
+	}
+
+	/**
+	 * @param {object} options options
+	 * @param {function(string, number, number, number, number, number, number): void} onChunk called for each chunk of code
+	 * @param {function(number, string, string)} onSource called for each source
+	 * @param {function(number, string)} onName called for each name
+	 * @returns {void}
+	 */
+	streamChunks(options, onChunk, onSource, onName) {
+		if (this._value === undefined) {
+			this._value = this._valueAsBuffer.toString("utf-8");
+		}
+		onSource(0, this._name, this._value);
+		const finalSource = !!(options && options.finalSource);
+		if (!options || options.columns !== false) {
+			// With column info we need to read all lines and split them
+			const matches = splitIntoPotentialTokens(this._value);
+			let line = 1;
+			let column = 0;
+			if (matches !== null) {
+				for (const match of matches) {
+					const isEndOfLine = match.endsWith("\n");
+					if (isEndOfLine && match.length === 1) {
+						if (!finalSource) onChunk(match, line, column, -1, -1, -1, -1);
+					} else {
+						const chunk = finalSource ? undefined : match;
+						onChunk(chunk, line, column, 0, line, column, -1);
+					}
+					if (isEndOfLine) {
+						line++;
+						column = 0;
+					} else {
+						column += match.length;
+					}
+				}
+			}
+			return {
+				generatedLine: line,
+				generatedColumn: column,
+				source: finalSource ? this._value : undefined
+			};
+		} else if (finalSource) {
+			// Without column info and with final source we only
+			// need meta info to generate mapping
+			const result = getGeneratedSourceInfo(this._value);
+			const { generatedLine, generatedColumn } = result;
+			if (generatedColumn === 0) {
+				for (let line = 1; line < generatedLine; line++)
+					onChunk(undefined, line, 0, 0, line, 0, -1);
+			} else {
+				for (let line = 1; line <= generatedLine; line++)
+					onChunk(undefined, line, 0, 0, line, 0, -1);
+			}
+			return result;
+		} else {
+			// Without column info, but also without final source
+			// we need to split source by lines
+			let line = 1;
+			const matches = splitIntoLines(this._value);
+			let match;
+			for (match of matches) {
+				onChunk(finalSource ? undefined : match, line, 0, 0, line, 0, -1);
+				line++;
+			}
+			return matches.length === 0 || match.endsWith("\n")
+				? {
+						generatedLine: matches.length + 1,
+						generatedColumn: 0,
+						source: finalSource ? this._value : undefined
+				  }
+				: {
+						generatedLine: matches.length,
+						generatedColumn: match.length,
+						source: finalSource ? this._value : undefined
+				  };
+		}
+	}
+
+	updateHash(hash) {
+		if (this._valueAsBuffer === undefined) {
+			this._valueAsBuffer = Buffer.from(this._value, "utf-8");
+		}
+		hash.update("OriginalSource");
+		hash.update(this._valueAsBuffer);
+		hash.update(this._name || "");
+	}
+}
+
+module.exports = OriginalSource;
diff --git a/node_modules/webpack-sources/lib/PrefixSource.js b/node_modules/webpack-sources/lib/PrefixSource.js
new file mode 100644
index 00000000..a54314cb
--- /dev/null
+++ b/node_modules/webpack-sources/lib/PrefixSource.js
@@ -0,0 +1,114 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+const RawSource = require("./RawSource");
+const streamChunks = require("./helpers/streamChunks");
+const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
+
+const REPLACE_REGEX = /\n(?=.|\s)/g;
+
+class PrefixSource extends Source {
+	constructor(prefix, source) {
+		super();
+		this._source =
+			typeof source === "string" || Buffer.isBuffer(source)
+				? new RawSource(source, true)
+				: source;
+		this._prefix = prefix;
+	}
+
+	getPrefix() {
+		return this._prefix;
+	}
+
+	original() {
+		return this._source;
+	}
+
+	source() {
+		const node = this._source.source();
+		const prefix = this._prefix;
+		return prefix + node.replace(REPLACE_REGEX, "\n" + prefix);
+	}
+
+	// TODO efficient buffer() implementation
+
+	map(options) {
+		return getMap(this, options);
+	}
+
+	sourceAndMap(options) {
+		return getSourceAndMap(this, options);
+	}
+
+	streamChunks(options, onChunk, onSource, onName) {
+		const prefix = this._prefix;
+		const prefixOffset = prefix.length;
+		const linesOnly = !!(options && options.columns === false);
+		const { generatedLine, generatedColumn, source } = streamChunks(
+			this._source,
+			options,
+			(
+				chunk,
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			) => {
+				if (generatedColumn !== 0) {
+					// In the middle of the line, we just adject the column
+					generatedColumn += prefixOffset;
+				} else if (chunk !== undefined) {
+					// At the start of the line, when we have source content
+					// add the prefix as generated mapping
+					// (in lines only mode we just add it to the original mapping
+					// for performance reasons)
+					if (linesOnly || sourceIndex < 0) {
+						chunk = prefix + chunk;
+					} else if (prefixOffset > 0) {
+						onChunk(prefix, generatedLine, generatedColumn, -1, -1, -1, -1);
+						generatedColumn += prefixOffset;
+					}
+				} else if (!linesOnly) {
+					// Without source content, we only need to adject the column info
+					// expect in lines only mode where prefix is added to original mapping
+					generatedColumn += prefixOffset;
+				}
+				onChunk(
+					chunk,
+					generatedLine,
+					generatedColumn,
+					sourceIndex,
+					originalLine,
+					originalColumn,
+					nameIndex
+				);
+			},
+			onSource,
+			onName
+		);
+		return {
+			generatedLine,
+			generatedColumn:
+				generatedColumn === 0 ? 0 : prefixOffset + generatedColumn,
+			source:
+				source !== undefined
+					? prefix + source.replace(REPLACE_REGEX, "\n" + prefix)
+					: undefined
+		};
+	}
+
+	updateHash(hash) {
+		hash.update("PrefixSource");
+		this._source.updateHash(hash);
+		hash.update(this._prefix);
+	}
+}
+
+module.exports = PrefixSource;
diff --git a/node_modules/webpack-sources/lib/RawSource.js b/node_modules/webpack-sources/lib/RawSource.js
new file mode 100644
index 00000000..71f1341c
--- /dev/null
+++ b/node_modules/webpack-sources/lib/RawSource.js
@@ -0,0 +1,81 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const streamChunksOfRawSource = require("./helpers/streamChunksOfRawSource");
+const Source = require("./Source");
+
+class RawSource extends Source {
+	constructor(value, convertToString = false) {
+		super();
+		const isBuffer = Buffer.isBuffer(value);
+		if (!isBuffer && typeof value !== "string") {
+			throw new TypeError("argument 'value' must be either string of Buffer");
+		}
+		this._valueIsBuffer = !convertToString && isBuffer;
+		this._value = convertToString && isBuffer ? undefined : value;
+		this._valueAsBuffer = isBuffer ? value : undefined;
+		this._valueAsString = isBuffer ? undefined : value;
+	}
+
+	isBuffer() {
+		return this._valueIsBuffer;
+	}
+
+	source() {
+		if (this._value === undefined) {
+			this._value = this._valueAsBuffer.toString("utf-8");
+		}
+		return this._value;
+	}
+
+	buffer() {
+		if (this._valueAsBuffer === undefined) {
+			this._valueAsBuffer = Buffer.from(this._value, "utf-8");
+		}
+		return this._valueAsBuffer;
+	}
+
+	map(options) {
+		return null;
+	}
+
+	/**
+	 * @param {object} options options
+	 * @param {function(string, number, number, number, number, number, number): void} onChunk called for each chunk of code
+	 * @param {function(number, string, string)} onSource called for each source
+	 * @param {function(number, string)} onName called for each name
+	 * @returns {void}
+	 */
+	streamChunks(options, onChunk, onSource, onName) {
+		if (this._value === undefined) {
+			this._value = Buffer.from(this._valueAsBuffer, "utf-8");
+		}
+		if (this._valueAsString === undefined) {
+			this._valueAsString =
+				typeof this._value === "string"
+					? this._value
+					: this._value.toString("utf-8");
+		}
+		return streamChunksOfRawSource(
+			this._valueAsString,
+			onChunk,
+			onSource,
+			onName,
+			!!(options && options.finalSource)
+		);
+	}
+
+	updateHash(hash) {
+		if (this._valueAsBuffer === undefined) {
+			this._valueAsBuffer = Buffer.from(this._value, "utf-8");
+		}
+		hash.update("RawSource");
+		hash.update(this._valueAsBuffer);
+	}
+}
+
+module.exports = RawSource;
diff --git a/node_modules/webpack-sources/lib/ReplaceSource.js b/node_modules/webpack-sources/lib/ReplaceSource.js
new file mode 100644
index 00000000..1a678d17
--- /dev/null
+++ b/node_modules/webpack-sources/lib/ReplaceSource.js
@@ -0,0 +1,467 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
+const streamChunks = require("./helpers/streamChunks");
+const Source = require("./Source");
+const splitIntoLines = require("./helpers/splitIntoLines");
+
+// since v8 7.0, Array.prototype.sort is stable
+const hasStableSort =
+	typeof process === "object" &&
+	process.versions &&
+	typeof process.versions.v8 === "string" &&
+	!/^[0-6]\./.test(process.versions.v8);
+
+// This is larger than max string length
+const MAX_SOURCE_POSITION = 0x20000000;
+
+class Replacement {
+	constructor(start, end, content, name) {
+		this.start = start;
+		this.end = end;
+		this.content = content;
+		this.name = name;
+		if (!hasStableSort) {
+			this.index = -1;
+		}
+	}
+}
+
+class ReplaceSource extends Source {
+	constructor(source, name) {
+		super();
+		this._source = source;
+		this._name = name;
+		/** @type {Replacement[]} */
+		this._replacements = [];
+		this._isSorted = true;
+	}
+
+	getName() {
+		return this._name;
+	}
+
+	getReplacements() {
+		this._sortReplacements();
+		return this._replacements;
+	}
+
+	replace(start, end, newValue, name) {
+		if (typeof newValue !== "string")
+			throw new Error(
+				"insertion must be a string, but is a " + typeof newValue
+			);
+		this._replacements.push(new Replacement(start, end, newValue, name));
+		this._isSorted = false;
+	}
+
+	insert(pos, newValue, name) {
+		if (typeof newValue !== "string")
+			throw new Error(
+				"insertion must be a string, but is a " +
+					typeof newValue +
+					": " +
+					newValue
+			);
+		this._replacements.push(new Replacement(pos, pos - 1, newValue, name));
+		this._isSorted = false;
+	}
+
+	source() {
+		if (this._replacements.length === 0) {
+			return this._source.source();
+		}
+		let current = this._source.source();
+		let pos = 0;
+		const result = [];
+
+		this._sortReplacements();
+		for (const replacement of this._replacements) {
+			const start = Math.floor(replacement.start);
+			const end = Math.floor(replacement.end + 1);
+			if (pos < start) {
+				const offset = start - pos;
+				result.push(current.slice(0, offset));
+				current = current.slice(offset);
+				pos = start;
+			}
+			result.push(replacement.content);
+			if (pos < end) {
+				const offset = end - pos;
+				current = current.slice(offset);
+				pos = end;
+			}
+		}
+		result.push(current);
+		return result.join("");
+	}
+
+	map(options) {
+		if (this._replacements.length === 0) {
+			return this._source.map(options);
+		}
+		return getMap(this, options);
+	}
+
+	sourceAndMap(options) {
+		if (this._replacements.length === 0) {
+			return this._source.sourceAndMap(options);
+		}
+		return getSourceAndMap(this, options);
+	}
+
+	original() {
+		return this._source;
+	}
+
+	_sortReplacements() {
+		if (this._isSorted) return;
+		if (hasStableSort) {
+			this._replacements.sort(function (a, b) {
+				const diff1 = a.start - b.start;
+				if (diff1 !== 0) return diff1;
+				const diff2 = a.end - b.end;
+				if (diff2 !== 0) return diff2;
+				return 0;
+			});
+		} else {
+			this._replacements.forEach((repl, i) => (repl.index = i));
+			this._replacements.sort(function (a, b) {
+				const diff1 = a.start - b.start;
+				if (diff1 !== 0) return diff1;
+				const diff2 = a.end - b.end;
+				if (diff2 !== 0) return diff2;
+				return a.index - b.index;
+			});
+		}
+		this._isSorted = true;
+	}
+
+	streamChunks(options, onChunk, onSource, onName) {
+		this._sortReplacements();
+		const repls = this._replacements;
+		let pos = 0;
+		let i = 0;
+		let replacmentEnd = -1;
+		let nextReplacement =
+			i < repls.length ? Math.floor(repls[i].start) : MAX_SOURCE_POSITION;
+		let generatedLineOffset = 0;
+		let generatedColumnOffset = 0;
+		let generatedColumnOffsetLine = 0;
+		const sourceContents = [];
+		const nameMapping = new Map();
+		const nameIndexMapping = [];
+		const checkOriginalContent = (sourceIndex, line, column, expectedChunk) => {
+			let content =
+				sourceIndex < sourceContents.length
+					? sourceContents[sourceIndex]
+					: undefined;
+			if (content === undefined) return false;
+			if (typeof content === "string") {
+				content = splitIntoLines(content);
+				sourceContents[sourceIndex] = content;
+			}
+			const contentLine = line <= content.length ? content[line - 1] : null;
+			if (contentLine === null) return false;
+			return (
+				contentLine.slice(column, column + expectedChunk.length) ===
+				expectedChunk
+			);
+		};
+		let { generatedLine, generatedColumn } = streamChunks(
+			this._source,
+			Object.assign({}, options, { finalSource: false }),
+			(
+				chunk,
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			) => {
+				let chunkPos = 0;
+				let endPos = pos + chunk.length;
+
+				// Skip over when it has been replaced
+				if (replacmentEnd > pos) {
+					// Skip over the whole chunk
+					if (replacmentEnd >= endPos) {
+						const line = generatedLine + generatedLineOffset;
+						if (chunk.endsWith("\n")) {
+							generatedLineOffset--;
+							if (generatedColumnOffsetLine === line) {
+								// undo exiting corrections form the current line
+								generatedColumnOffset += generatedColumn;
+							}
+						} else if (generatedColumnOffsetLine === line) {
+							generatedColumnOffset -= chunk.length;
+						} else {
+							generatedColumnOffset = -chunk.length;
+							generatedColumnOffsetLine = line;
+						}
+						pos = endPos;
+						return;
+					}
+
+					// Partially skip over chunk
+					chunkPos = replacmentEnd - pos;
+					if (
+						checkOriginalContent(
+							sourceIndex,
+							originalLine,
+							originalColumn,
+							chunk.slice(0, chunkPos)
+						)
+					) {
+						originalColumn += chunkPos;
+					}
+					pos += chunkPos;
+					const line = generatedLine + generatedLineOffset;
+					if (generatedColumnOffsetLine === line) {
+						generatedColumnOffset -= chunkPos;
+					} else {
+						generatedColumnOffset = -chunkPos;
+						generatedColumnOffsetLine = line;
+					}
+					generatedColumn += chunkPos;
+				}
+
+				// Is a replacement in the chunk?
+				if (nextReplacement < endPos) {
+					do {
+						let line = generatedLine + generatedLineOffset;
+						if (nextReplacement > pos) {
+							// Emit chunk until replacement
+							const offset = nextReplacement - pos;
+							const chunkSlice = chunk.slice(chunkPos, chunkPos + offset);
+							onChunk(
+								chunkSlice,
+								line,
+								generatedColumn +
+									(line === generatedColumnOffsetLine
+										? generatedColumnOffset
+										: 0),
+								sourceIndex,
+								originalLine,
+								originalColumn,
+								nameIndex < 0 || nameIndex >= nameIndexMapping.length
+									? -1
+									: nameIndexMapping[nameIndex]
+							);
+							generatedColumn += offset;
+							chunkPos += offset;
+							pos = nextReplacement;
+							if (
+								checkOriginalContent(
+									sourceIndex,
+									originalLine,
+									originalColumn,
+									chunkSlice
+								)
+							) {
+								originalColumn += chunkSlice.length;
+							}
+						}
+
+						// Insert replacement content splitted into chunks by lines
+						const { content, name } = repls[i];
+						let matches = splitIntoLines(content);
+						let replacementNameIndex = nameIndex;
+						if (sourceIndex >= 0 && name) {
+							let globalIndex = nameMapping.get(name);
+							if (globalIndex === undefined) {
+								globalIndex = nameMapping.size;
+								nameMapping.set(name, globalIndex);
+								onName(globalIndex, name);
+							}
+							replacementNameIndex = globalIndex;
+						}
+						for (let m = 0; m < matches.length; m++) {
+							const contentLine = matches[m];
+							onChunk(
+								contentLine,
+								line,
+								generatedColumn +
+									(line === generatedColumnOffsetLine
+										? generatedColumnOffset
+										: 0),
+								sourceIndex,
+								originalLine,
+								originalColumn,
+								replacementNameIndex
+							);
+
+							// Only the first chunk has name assigned
+							replacementNameIndex = -1;
+
+							if (m === matches.length - 1 && !contentLine.endsWith("\n")) {
+								if (generatedColumnOffsetLine === line) {
+									generatedColumnOffset += contentLine.length;
+								} else {
+									generatedColumnOffset = contentLine.length;
+									generatedColumnOffsetLine = line;
+								}
+							} else {
+								generatedLineOffset++;
+								line++;
+								generatedColumnOffset = -generatedColumn;
+								generatedColumnOffsetLine = line;
+							}
+						}
+
+						// Remove replaced content by settings this variable
+						replacmentEnd = Math.max(
+							replacmentEnd,
+							Math.floor(repls[i].end + 1)
+						);
+
+						// Move to next replacment
+						i++;
+						nextReplacement =
+							i < repls.length
+								? Math.floor(repls[i].start)
+								: MAX_SOURCE_POSITION;
+
+						// Skip over when it has been replaced
+						const offset = chunk.length - endPos + replacmentEnd - chunkPos;
+						if (offset > 0) {
+							// Skip over whole chunk
+							if (replacmentEnd >= endPos) {
+								let line = generatedLine + generatedLineOffset;
+								if (chunk.endsWith("\n")) {
+									generatedLineOffset--;
+									if (generatedColumnOffsetLine === line) {
+										// undo exiting corrections form the current line
+										generatedColumnOffset += generatedColumn;
+									}
+								} else if (generatedColumnOffsetLine === line) {
+									generatedColumnOffset -= chunk.length - chunkPos;
+								} else {
+									generatedColumnOffset = chunkPos - chunk.length;
+									generatedColumnOffsetLine = line;
+								}
+								pos = endPos;
+								return;
+							}
+
+							// Partially skip over chunk
+							const line = generatedLine + generatedLineOffset;
+							if (
+								checkOriginalContent(
+									sourceIndex,
+									originalLine,
+									originalColumn,
+									chunk.slice(chunkPos, chunkPos + offset)
+								)
+							) {
+								originalColumn += offset;
+							}
+							chunkPos += offset;
+							pos += offset;
+							if (generatedColumnOffsetLine === line) {
+								generatedColumnOffset -= offset;
+							} else {
+								generatedColumnOffset = -offset;
+								generatedColumnOffsetLine = line;
+							}
+							generatedColumn += offset;
+						}
+					} while (nextReplacement < endPos);
+				}
+
+				// Emit remaining chunk
+				if (chunkPos < chunk.length) {
+					const chunkSlice = chunkPos === 0 ? chunk : chunk.slice(chunkPos);
+					const line = generatedLine + generatedLineOffset;
+					onChunk(
+						chunkSlice,
+						line,
+						generatedColumn +
+							(line === generatedColumnOffsetLine ? generatedColumnOffset : 0),
+						sourceIndex,
+						originalLine,
+						originalColumn,
+						nameIndex < 0 ? -1 : nameIndexMapping[nameIndex]
+					);
+				}
+				pos = endPos;
+			},
+			(sourceIndex, source, sourceContent) => {
+				while (sourceContents.length < sourceIndex)
+					sourceContents.push(undefined);
+				sourceContents[sourceIndex] = sourceContent;
+				onSource(sourceIndex, source, sourceContent);
+			},
+			(nameIndex, name) => {
+				let globalIndex = nameMapping.get(name);
+				if (globalIndex === undefined) {
+					globalIndex = nameMapping.size;
+					nameMapping.set(name, globalIndex);
+					onName(globalIndex, name);
+				}
+				nameIndexMapping[nameIndex] = globalIndex;
+			}
+		);
+
+		// Handle remaining replacements
+		let remainer = "";
+		for (; i < repls.length; i++) {
+			remainer += repls[i].content;
+		}
+
+		// Insert remaining replacements content splitted into chunks by lines
+		let line = generatedLine + generatedLineOffset;
+		let matches = splitIntoLines(remainer);
+		for (let m = 0; m < matches.length; m++) {
+			const contentLine = matches[m];
+			onChunk(
+				contentLine,
+				line,
+				generatedColumn +
+					(line === generatedColumnOffsetLine ? generatedColumnOffset : 0),
+				-1,
+				-1,
+				-1,
+				-1
+			);
+
+			if (m === matches.length - 1 && !contentLine.endsWith("\n")) {
+				if (generatedColumnOffsetLine === line) {
+					generatedColumnOffset += contentLine.length;
+				} else {
+					generatedColumnOffset = contentLine.length;
+					generatedColumnOffsetLine = line;
+				}
+			} else {
+				generatedLineOffset++;
+				line++;
+				generatedColumnOffset = -generatedColumn;
+				generatedColumnOffsetLine = line;
+			}
+		}
+
+		return {
+			generatedLine: line,
+			generatedColumn:
+				generatedColumn +
+				(line === generatedColumnOffsetLine ? generatedColumnOffset : 0)
+		};
+	}
+
+	updateHash(hash) {
+		this._sortReplacements();
+		hash.update("ReplaceSource");
+		this._source.updateHash(hash);
+		hash.update(this._name || "");
+		for (const repl of this._replacements) {
+			hash.update(`${repl.start}${repl.end}${repl.content}${repl.name}`);
+		}
+	}
+}
+
+module.exports = ReplaceSource;
diff --git a/node_modules/webpack-sources/lib/SizeOnlySource.js b/node_modules/webpack-sources/lib/SizeOnlySource.js
new file mode 100644
index 00000000..a6e92943
--- /dev/null
+++ b/node_modules/webpack-sources/lib/SizeOnlySource.js
@@ -0,0 +1,42 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+
+class SizeOnlySource extends Source {
+	constructor(size) {
+		super();
+		this._size = size;
+	}
+
+	_error() {
+		return new Error(
+			"Content and Map of this Source is not available (only size() is supported)"
+		);
+	}
+
+	size() {
+		return this._size;
+	}
+
+	source() {
+		throw this._error();
+	}
+
+	buffer() {
+		throw this._error();
+	}
+
+	map(options) {
+		throw this._error();
+	}
+
+	updateHash() {
+		throw this._error();
+	}
+}
+
+module.exports = SizeOnlySource;
diff --git a/node_modules/webpack-sources/lib/Source.js b/node_modules/webpack-sources/lib/Source.js
new file mode 100644
index 00000000..fb86c2e9
--- /dev/null
+++ b/node_modules/webpack-sources/lib/Source.js
@@ -0,0 +1,38 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class Source {
+	source() {
+		throw new Error("Abstract");
+	}
+
+	buffer() {
+		const source = this.source();
+		if (Buffer.isBuffer(source)) return source;
+		return Buffer.from(source, "utf-8");
+	}
+
+	size() {
+		return this.buffer().length;
+	}
+
+	map(options) {
+		return null;
+	}
+
+	sourceAndMap(options) {
+		return {
+			source: this.source(),
+			map: this.map(options)
+		};
+	}
+
+	updateHash(hash) {
+		throw new Error("Abstract");
+	}
+}
+
+module.exports = Source;
diff --git a/node_modules/webpack-sources/lib/SourceMapSource.js b/node_modules/webpack-sources/lib/SourceMapSource.js
new file mode 100644
index 00000000..88a7cb8f
--- /dev/null
+++ b/node_modules/webpack-sources/lib/SourceMapSource.js
@@ -0,0 +1,247 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Source = require("./Source");
+const streamChunksOfSourceMap = require("./helpers/streamChunksOfSourceMap");
+const streamChunksOfCombinedSourceMap = require("./helpers/streamChunksOfCombinedSourceMap");
+const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
+
+class SourceMapSource extends Source {
+	constructor(
+		value,
+		name,
+		sourceMap,
+		originalSource,
+		innerSourceMap,
+		removeOriginalSource
+	) {
+		super();
+		const valueIsBuffer = Buffer.isBuffer(value);
+		this._valueAsString = valueIsBuffer ? undefined : value;
+		this._valueAsBuffer = valueIsBuffer ? value : undefined;
+
+		this._name = name;
+
+		this._hasSourceMap = !!sourceMap;
+		const sourceMapIsBuffer = Buffer.isBuffer(sourceMap);
+		const sourceMapIsString = typeof sourceMap === "string";
+		this._sourceMapAsObject =
+			sourceMapIsBuffer || sourceMapIsString ? undefined : sourceMap;
+		this._sourceMapAsString = sourceMapIsString ? sourceMap : undefined;
+		this._sourceMapAsBuffer = sourceMapIsBuffer ? sourceMap : undefined;
+
+		this._hasOriginalSource = !!originalSource;
+		const originalSourceIsBuffer = Buffer.isBuffer(originalSource);
+		this._originalSourceAsString = originalSourceIsBuffer
+			? undefined
+			: originalSource;
+		this._originalSourceAsBuffer = originalSourceIsBuffer
+			? originalSource
+			: undefined;
+
+		this._hasInnerSourceMap = !!innerSourceMap;
+		const innerSourceMapIsBuffer = Buffer.isBuffer(innerSourceMap);
+		const innerSourceMapIsString = typeof innerSourceMap === "string";
+		this._innerSourceMapAsObject =
+			innerSourceMapIsBuffer || innerSourceMapIsString
+				? undefined
+				: innerSourceMap;
+		this._innerSourceMapAsString = innerSourceMapIsString
+			? innerSourceMap
+			: undefined;
+		this._innerSourceMapAsBuffer = innerSourceMapIsBuffer
+			? innerSourceMap
+			: undefined;
+
+		this._removeOriginalSource = removeOriginalSource;
+	}
+
+	_ensureValueBuffer() {
+		if (this._valueAsBuffer === undefined) {
+			this._valueAsBuffer = Buffer.from(this._valueAsString, "utf-8");
+		}
+	}
+
+	_ensureValueString() {
+		if (this._valueAsString === undefined) {
+			this._valueAsString = this._valueAsBuffer.toString("utf-8");
+		}
+	}
+
+	_ensureOriginalSourceBuffer() {
+		if (this._originalSourceAsBuffer === undefined && this._hasOriginalSource) {
+			this._originalSourceAsBuffer = Buffer.from(
+				this._originalSourceAsString,
+				"utf-8"
+			);
+		}
+	}
+
+	_ensureOriginalSourceString() {
+		if (this._originalSourceAsString === undefined && this._hasOriginalSource) {
+			this._originalSourceAsString = this._originalSourceAsBuffer.toString(
+				"utf-8"
+			);
+		}
+	}
+
+	_ensureInnerSourceMapObject() {
+		if (this._innerSourceMapAsObject === undefined && this._hasInnerSourceMap) {
+			this._ensureInnerSourceMapString();
+			this._innerSourceMapAsObject = JSON.parse(this._innerSourceMapAsString);
+		}
+	}
+
+	_ensureInnerSourceMapBuffer() {
+		if (this._innerSourceMapAsBuffer === undefined && this._hasInnerSourceMap) {
+			this._ensureInnerSourceMapString();
+			this._innerSourceMapAsBuffer = Buffer.from(
+				this._innerSourceMapAsString,
+				"utf-8"
+			);
+		}
+	}
+
+	_ensureInnerSourceMapString() {
+		if (this._innerSourceMapAsString === undefined && this._hasInnerSourceMap) {
+			if (this._innerSourceMapAsBuffer !== undefined) {
+				this._innerSourceMapAsString = this._innerSourceMapAsBuffer.toString(
+					"utf-8"
+				);
+			} else {
+				this._innerSourceMapAsString = JSON.stringify(
+					this._innerSourceMapAsObject
+				);
+			}
+		}
+	}
+
+	_ensureSourceMapObject() {
+		if (this._sourceMapAsObject === undefined) {
+			this._ensureSourceMapString();
+			this._sourceMapAsObject = JSON.parse(this._sourceMapAsString);
+		}
+	}
+
+	_ensureSourceMapBuffer() {
+		if (this._sourceMapAsBuffer === undefined) {
+			this._ensureSourceMapString();
+			this._sourceMapAsBuffer = Buffer.from(this._sourceMapAsString, "utf-8");
+		}
+	}
+
+	_ensureSourceMapString() {
+		if (this._sourceMapAsString === undefined) {
+			if (this._sourceMapAsBuffer !== undefined) {
+				this._sourceMapAsString = this._sourceMapAsBuffer.toString("utf-8");
+			} else {
+				this._sourceMapAsString = JSON.stringify(this._sourceMapAsObject);
+			}
+		}
+	}
+
+	getArgsAsBuffers() {
+		this._ensureValueBuffer();
+		this._ensureSourceMapBuffer();
+		this._ensureOriginalSourceBuffer();
+		this._ensureInnerSourceMapBuffer();
+		return [
+			this._valueAsBuffer,
+			this._name,
+			this._sourceMapAsBuffer,
+			this._originalSourceAsBuffer,
+			this._innerSourceMapAsBuffer,
+			this._removeOriginalSource
+		];
+	}
+
+	buffer() {
+		this._ensureValueBuffer();
+		return this._valueAsBuffer;
+	}
+
+	source() {
+		this._ensureValueString();
+		return this._valueAsString;
+	}
+
+	map(options) {
+		if (!this._hasInnerSourceMap) {
+			this._ensureSourceMapObject();
+			return this._sourceMapAsObject;
+		}
+		return getMap(this, options);
+	}
+
+	sourceAndMap(options) {
+		if (!this._hasInnerSourceMap) {
+			this._ensureValueString();
+			this._ensureSourceMapObject();
+			return {
+				source: this._valueAsString,
+				map: this._sourceMapAsObject
+			};
+		}
+		return getSourceAndMap(this, options);
+	}
+
+	streamChunks(options, onChunk, onSource, onName) {
+		this._ensureValueString();
+		this._ensureSourceMapObject();
+		this._ensureOriginalSourceString();
+		if (this._hasInnerSourceMap) {
+			this._ensureInnerSourceMapObject();
+			return streamChunksOfCombinedSourceMap(
+				this._valueAsString,
+				this._sourceMapAsObject,
+				this._name,
+				this._originalSourceAsString,
+				this._innerSourceMapAsObject,
+				this._removeOriginalSource,
+				onChunk,
+				onSource,
+				onName,
+				!!(options && options.finalSource),
+				!!(options && options.columns !== false)
+			);
+		} else {
+			return streamChunksOfSourceMap(
+				this._valueAsString,
+				this._sourceMapAsObject,
+				onChunk,
+				onSource,
+				onName,
+				!!(options && options.finalSource),
+				!!(options && options.columns !== false)
+			);
+		}
+	}
+
+	updateHash(hash) {
+		this._ensureValueBuffer();
+		this._ensureSourceMapBuffer();
+		this._ensureOriginalSourceBuffer();
+		this._ensureInnerSourceMapBuffer();
+
+		hash.update("SourceMapSource");
+
+		hash.update(this._valueAsBuffer);
+
+		hash.update(this._sourceMapAsBuffer);
+
+		if (this._hasOriginalSource) {
+			hash.update(this._originalSourceAsBuffer);
+		}
+
+		if (this._hasInnerSourceMap) {
+			hash.update(this._innerSourceMapAsBuffer);
+		}
+
+		hash.update(this._removeOriginalSource ? "true" : "false");
+	}
+}
+
+module.exports = SourceMapSource;
diff --git a/node_modules/webpack-sources/lib/helpers/createMappingsSerializer.js b/node_modules/webpack-sources/lib/helpers/createMappingsSerializer.js
new file mode 100644
index 00000000..8dafe438
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/createMappingsSerializer.js
@@ -0,0 +1,206 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split(
+	""
+);
+
+const CONTINUATION_BIT = 0x20;
+
+const createMappingsSerializer = options => {
+	const linesOnly = options && options.columns === false;
+	return linesOnly
+		? createLinesOnlyMappingsSerializer()
+		: createFullMappingsSerializer();
+};
+
+const createFullMappingsSerializer = () => {
+	let currentLine = 1;
+	let currentColumn = 0;
+	let currentSourceIndex = 0;
+	let currentOriginalLine = 1;
+	let currentOriginalColumn = 0;
+	let currentNameIndex = 0;
+	let activeMapping = false;
+	let activeName = false;
+	let initial = true;
+	return (
+		generatedLine,
+		generatedColumn,
+		sourceIndex,
+		originalLine,
+		originalColumn,
+		nameIndex
+	) => {
+		if (activeMapping && currentLine === generatedLine) {
+			// A mapping is still active
+			if (
+				sourceIndex === currentSourceIndex &&
+				originalLine === currentOriginalLine &&
+				originalColumn === currentOriginalColumn &&
+				!activeName &&
+				nameIndex < 0
+			) {
+				// avoid repeating the same original mapping
+				return "";
+			}
+		} else {
+			// No mapping is active
+			if (sourceIndex < 0) {
+				// avoid writing unneccessary generated mappings
+				return "";
+			}
+		}
+
+		let str;
+		if (currentLine < generatedLine) {
+			str = ";".repeat(generatedLine - currentLine);
+			currentLine = generatedLine;
+			currentColumn = 0;
+			initial = false;
+		} else if (initial) {
+			str = "";
+			initial = false;
+		} else {
+			str = ",";
+		}
+
+		const writeValue = value => {
+			const sign = (value >>> 31) & 1;
+			const mask = value >> 31;
+			const absValue = (value + mask) ^ mask;
+			let data = (absValue << 1) | sign;
+			for (;;) {
+				const sextet = data & 0x1f;
+				data >>= 5;
+				if (data === 0) {
+					str += ALPHABET[sextet];
+					break;
+				} else {
+					str += ALPHABET[sextet | CONTINUATION_BIT];
+				}
+			}
+		};
+		writeValue(generatedColumn - currentColumn);
+		currentColumn = generatedColumn;
+		if (sourceIndex >= 0) {
+			activeMapping = true;
+			if (sourceIndex === currentSourceIndex) {
+				str += "A";
+			} else {
+				writeValue(sourceIndex - currentSourceIndex);
+				currentSourceIndex = sourceIndex;
+			}
+			writeValue(originalLine - currentOriginalLine);
+			currentOriginalLine = originalLine;
+			if (originalColumn === currentOriginalColumn) {
+				str += "A";
+			} else {
+				writeValue(originalColumn - currentOriginalColumn);
+				currentOriginalColumn = originalColumn;
+			}
+			if (nameIndex >= 0) {
+				writeValue(nameIndex - currentNameIndex);
+				currentNameIndex = nameIndex;
+				activeName = true;
+			} else {
+				activeName = false;
+			}
+		} else {
+			activeMapping = false;
+		}
+		return str;
+	};
+};
+
+const createLinesOnlyMappingsSerializer = () => {
+	let lastWrittenLine = 0;
+	let currentLine = 1;
+	let currentSourceIndex = 0;
+	let currentOriginalLine = 1;
+	return (
+		generatedLine,
+		_generatedColumn,
+		sourceIndex,
+		originalLine,
+		_originalColumn,
+		_nameIndex
+	) => {
+		if (sourceIndex < 0) {
+			// avoid writing generated mappings at all
+			return "";
+		}
+		if (lastWrittenLine === generatedLine) {
+			// avoid writing multiple original mappings per line
+			return "";
+		}
+		let str;
+		const writeValue = value => {
+			const sign = (value >>> 31) & 1;
+			const mask = value >> 31;
+			const absValue = (value + mask) ^ mask;
+			let data = (absValue << 1) | sign;
+			for (;;) {
+				const sextet = data & 0x1f;
+				data >>= 5;
+				if (data === 0) {
+					str += ALPHABET[sextet];
+					break;
+				} else {
+					str += ALPHABET[sextet | CONTINUATION_BIT];
+				}
+			}
+		};
+		lastWrittenLine = generatedLine;
+		if (generatedLine === currentLine + 1) {
+			currentLine = generatedLine;
+			if (sourceIndex === currentSourceIndex) {
+				currentSourceIndex = sourceIndex;
+				if (originalLine === currentOriginalLine + 1) {
+					currentOriginalLine = originalLine;
+					return ";AACA";
+				} else {
+					str = ";AA";
+					writeValue(originalLine - currentOriginalLine);
+					currentOriginalLine = originalLine;
+					return str + "A";
+				}
+			} else {
+				str = ";A";
+				writeValue(sourceIndex - currentSourceIndex);
+				currentSourceIndex = sourceIndex;
+				writeValue(originalLine - currentOriginalLine);
+				currentOriginalLine = originalLine;
+				return str + "A";
+			}
+		} else {
+			str = ";".repeat(generatedLine - currentLine);
+			currentLine = generatedLine;
+			if (sourceIndex === currentSourceIndex) {
+				currentSourceIndex = sourceIndex;
+				if (originalLine === currentOriginalLine + 1) {
+					currentOriginalLine = originalLine;
+					return str + "AACA";
+				} else {
+					str += "AA";
+					writeValue(originalLine - currentOriginalLine);
+					currentOriginalLine = originalLine;
+					return str + "A";
+				}
+			} else {
+				str += "A";
+				writeValue(sourceIndex - currentSourceIndex);
+				currentSourceIndex = sourceIndex;
+				writeValue(originalLine - currentOriginalLine);
+				currentOriginalLine = originalLine;
+				return str + "A";
+			}
+		}
+	};
+};
+
+module.exports = createMappingsSerializer;
diff --git a/node_modules/webpack-sources/lib/helpers/getFromStreamChunks.js b/node_modules/webpack-sources/lib/helpers/getFromStreamChunks.js
new file mode 100644
index 00000000..f45c639c
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/getFromStreamChunks.js
@@ -0,0 +1,129 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const createMappingsSerializer = require("./createMappingsSerializer");
+
+exports.getSourceAndMap = (inputSource, options) => {
+	let code = "";
+	let mappings = "";
+	let sources = [];
+	let sourcesContent = [];
+	let names = [];
+	const addMapping = createMappingsSerializer(options);
+	const { source } = inputSource.streamChunks(
+		Object.assign({}, options, { finalSource: true }),
+		(
+			chunk,
+			generatedLine,
+			generatedColumn,
+			sourceIndex,
+			originalLine,
+			originalColumn,
+			nameIndex
+		) => {
+			if (chunk !== undefined) code += chunk;
+			mappings += addMapping(
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			);
+		},
+		(sourceIndex, source, sourceContent) => {
+			while (sources.length < sourceIndex) {
+				sources.push(null);
+			}
+			sources[sourceIndex] = source;
+			if (sourceContent !== undefined) {
+				while (sourcesContent.length < sourceIndex) {
+					sourcesContent.push(null);
+				}
+				sourcesContent[sourceIndex] = sourceContent;
+			}
+		},
+		(nameIndex, name) => {
+			while (names.length < nameIndex) {
+				names.push(null);
+			}
+			names[nameIndex] = name;
+		}
+	);
+	return {
+		source: source !== undefined ? source : code,
+		map:
+			mappings.length > 0
+				? {
+						version: 3,
+						file: "x",
+						mappings,
+						sources,
+						sourcesContent:
+							sourcesContent.length > 0 ? sourcesContent : undefined,
+						names
+				  }
+				: null
+	};
+};
+
+exports.getMap = (source, options) => {
+	let mappings = "";
+	let sources = [];
+	let sourcesContent = [];
+	let names = [];
+	const addMapping = createMappingsSerializer(options);
+	source.streamChunks(
+		Object.assign({}, options, { source: false, finalSource: true }),
+		(
+			chunk,
+			generatedLine,
+			generatedColumn,
+			sourceIndex,
+			originalLine,
+			originalColumn,
+			nameIndex
+		) => {
+			mappings += addMapping(
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			);
+		},
+		(sourceIndex, source, sourceContent) => {
+			while (sources.length < sourceIndex) {
+				sources.push(null);
+			}
+			sources[sourceIndex] = source;
+			if (sourceContent !== undefined) {
+				while (sourcesContent.length < sourceIndex) {
+					sourcesContent.push(null);
+				}
+				sourcesContent[sourceIndex] = sourceContent;
+			}
+		},
+		(nameIndex, name) => {
+			while (names.length < nameIndex) {
+				names.push(null);
+			}
+			names[nameIndex] = name;
+		}
+	);
+	return mappings.length > 0
+		? {
+				version: 3,
+				file: "x",
+				mappings,
+				sources,
+				sourcesContent: sourcesContent.length > 0 ? sourcesContent : undefined,
+				names
+		  }
+		: null;
+};
diff --git a/node_modules/webpack-sources/lib/helpers/getGeneratedSourceInfo.js b/node_modules/webpack-sources/lib/helpers/getGeneratedSourceInfo.js
new file mode 100644
index 00000000..2cc12fcd
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/getGeneratedSourceInfo.js
@@ -0,0 +1,33 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const CHAR_CODE_NEW_LINE = "\n".charCodeAt(0);
+
+const getGeneratedSourceInfo = source => {
+	if (source === undefined) {
+		return {};
+	}
+	const lastLineStart = source.lastIndexOf("\n");
+	if (lastLineStart === -1) {
+		return {
+			generatedLine: 1,
+			generatedColumn: source.length,
+			source
+		};
+	}
+	let generatedLine = 2;
+	for (let i = 0; i < lastLineStart; i++) {
+		if (source.charCodeAt(i) === CHAR_CODE_NEW_LINE) generatedLine++;
+	}
+	return {
+		generatedLine,
+		generatedColumn: source.length - lastLineStart - 1,
+		source
+	};
+};
+
+module.exports = getGeneratedSourceInfo;
diff --git a/node_modules/webpack-sources/lib/helpers/getName.js b/node_modules/webpack-sources/lib/helpers/getName.js
new file mode 100644
index 00000000..db6a863a
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/getName.js
@@ -0,0 +1,14 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const getName = (sourceMap, index) => {
+	if (index < 0) return null;
+	const { names } = sourceMap;
+	return names[index];
+};
+
+module.exports = getName;
diff --git a/node_modules/webpack-sources/lib/helpers/getSource.js b/node_modules/webpack-sources/lib/helpers/getSource.js
new file mode 100644
index 00000000..b236563d
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/getSource.js
@@ -0,0 +1,17 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const getSource = (sourceMap, index) => {
+	if (index < 0) return null;
+	const { sourceRoot, sources } = sourceMap;
+	const source = sources[index];
+	if (!sourceRoot) return source;
+	if (sourceRoot.endsWith("/")) return sourceRoot + source;
+	return sourceRoot + "/" + source;
+};
+
+module.exports = getSource;
diff --git a/node_modules/webpack-sources/lib/helpers/readMappings.js b/node_modules/webpack-sources/lib/helpers/readMappings.js
new file mode 100644
index 00000000..31cb48d2
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/readMappings.js
@@ -0,0 +1,116 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const ALPHABET =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+const CONTINUATION_BIT = 0x20;
+const END_SEGMENT_BIT = 0x40;
+const NEXT_LINE = END_SEGMENT_BIT | 0x01;
+const INVALID = END_SEGMENT_BIT | 0x02;
+const DATA_MASK = 0x1f;
+
+const ccToValue = new Uint8Array("z".charCodeAt(0) + 1);
+{
+	ccToValue.fill(INVALID);
+	for (let i = 0; i < ALPHABET.length; i++) {
+		ccToValue[ALPHABET.charCodeAt(i)] = i;
+	}
+	ccToValue[",".charCodeAt(0)] = END_SEGMENT_BIT;
+	ccToValue[";".charCodeAt(0)] = NEXT_LINE;
+}
+const ccMax = ccToValue.length - 1;
+
+/**
+ * @param {string} mappings the mappings string
+ * @param {function(number, number, number, number, number, number): void} onMapping called for each mapping
+ * @returns {void}
+ */
+const readMappings = (mappings, onMapping) => {
+	// generatedColumn, [sourceIndex, originalLine, orignalColumn, [nameIndex]]
+	const currentData = new Uint32Array([0, 0, 1, 0, 0]);
+	let currentDataPos = 0;
+	// currentValue will include a sign bit at bit 0
+	let currentValue = 0;
+	let currentValuePos = 0;
+	let generatedLine = 1;
+	let generatedColumn = -1;
+	for (let i = 0; i < mappings.length; i++) {
+		const cc = mappings.charCodeAt(i);
+		if (cc > ccMax) continue;
+		const value = ccToValue[cc];
+		if ((value & END_SEGMENT_BIT) !== 0) {
+			// End current segment
+			if (currentData[0] > generatedColumn) {
+				if (currentDataPos === 1) {
+					onMapping(generatedLine, currentData[0], -1, -1, -1, -1);
+				} else if (currentDataPos === 4) {
+					onMapping(
+						generatedLine,
+						currentData[0],
+						currentData[1],
+						currentData[2],
+						currentData[3],
+						-1
+					);
+				} else if (currentDataPos === 5) {
+					onMapping(
+						generatedLine,
+						currentData[0],
+						currentData[1],
+						currentData[2],
+						currentData[3],
+						currentData[4]
+					);
+				}
+				generatedColumn = currentData[0];
+			}
+			currentDataPos = 0;
+			if (value === NEXT_LINE) {
+				// Start new line
+				generatedLine++;
+				currentData[0] = 0;
+				generatedColumn = -1;
+			}
+		} else if ((value & CONTINUATION_BIT) === 0) {
+			// last sextet
+			currentValue |= value << currentValuePos;
+			const finalValue =
+				currentValue & 1 ? -(currentValue >> 1) : currentValue >> 1;
+			currentData[currentDataPos++] += finalValue;
+			currentValuePos = 0;
+			currentValue = 0;
+		} else {
+			currentValue |= (value & DATA_MASK) << currentValuePos;
+			currentValuePos += 5;
+		}
+	}
+	// End current segment
+	if (currentDataPos === 1) {
+		onMapping(generatedLine, currentData[0], -1, -1, -1, -1);
+	} else if (currentDataPos === 4) {
+		onMapping(
+			generatedLine,
+			currentData[0],
+			currentData[1],
+			currentData[2],
+			currentData[3],
+			-1
+		);
+	} else if (currentDataPos === 5) {
+		onMapping(
+			generatedLine,
+			currentData[0],
+			currentData[1],
+			currentData[2],
+			currentData[3],
+			currentData[4]
+		);
+	}
+};
+
+module.exports = readMappings;
diff --git a/node_modules/webpack-sources/lib/helpers/splitIntoLines.js b/node_modules/webpack-sources/lib/helpers/splitIntoLines.js
new file mode 100644
index 00000000..e9ccafdf
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/splitIntoLines.js
@@ -0,0 +1,21 @@
+const splitIntoLines = str => {
+	const results = [];
+	const len = str.length;
+	let i = 0;
+	for (; i < len; ) {
+		const cc = str.charCodeAt(i);
+		// 10 is "\n".charCodeAt(0)
+		if (cc === 10) {
+			results.push("\n");
+			i++;
+		} else {
+			let j = i + 1;
+			// 10 is "\n".charCodeAt(0)
+			while (j < len && str.charCodeAt(j) !== 10) j++;
+			results.push(str.slice(i, j + 1));
+			i = j + 1;
+		}
+	}
+	return results;
+};
+module.exports = splitIntoLines;
diff --git a/node_modules/webpack-sources/lib/helpers/splitIntoPotentialTokens.js b/node_modules/webpack-sources/lib/helpers/splitIntoPotentialTokens.js
new file mode 100644
index 00000000..0f0bc421
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/splitIntoPotentialTokens.js
@@ -0,0 +1,41 @@
+// \n = 10
+// ; = 59
+// { = 123
+// } = 125
+// <space> = 32
+// \r = 13
+// \t = 9
+
+const splitIntoPotentialTokens = str => {
+	const len = str.length;
+	if (len === 0) return null;
+	const results = [];
+	let i = 0;
+	for (; i < len; ) {
+		const s = i;
+		block: {
+			let cc = str.charCodeAt(i);
+			while (cc !== 10 && cc !== 59 && cc !== 123 && cc !== 125) {
+				if (++i >= len) break block;
+				cc = str.charCodeAt(i);
+			}
+			while (
+				cc === 59 ||
+				cc === 32 ||
+				cc === 123 ||
+				cc === 125 ||
+				cc === 13 ||
+				cc === 9
+			) {
+				if (++i >= len) break block;
+				cc = str.charCodeAt(i);
+			}
+			if (cc === 10) {
+				i++;
+			}
+		}
+		results.push(str.slice(s, i));
+	}
+	return results;
+};
+module.exports = splitIntoPotentialTokens;
diff --git a/node_modules/webpack-sources/lib/helpers/streamAndGetSourceAndMap.js b/node_modules/webpack-sources/lib/helpers/streamAndGetSourceAndMap.js
new file mode 100644
index 00000000..529fd766
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/streamAndGetSourceAndMap.js
@@ -0,0 +1,102 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const createMappingsSerializer = require("./createMappingsSerializer");
+const streamChunks = require("./streamChunks");
+
+const streamAndGetSourceAndMap = (
+	inputSource,
+	options,
+	onChunk,
+	onSource,
+	onName
+) => {
+	let code = "";
+	let mappings = "";
+	let sources = [];
+	let sourcesContent = [];
+	let names = [];
+	const addMapping = createMappingsSerializer(
+		Object.assign({}, options, { columns: true })
+	);
+	const finalSource = !!(options && options.finalSource);
+	const { generatedLine, generatedColumn, source } = streamChunks(
+		inputSource,
+		options,
+		(
+			chunk,
+			generatedLine,
+			generatedColumn,
+			sourceIndex,
+			originalLine,
+			originalColumn,
+			nameIndex
+		) => {
+			if (chunk !== undefined) code += chunk;
+			mappings += addMapping(
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			);
+			return onChunk(
+				finalSource ? undefined : chunk,
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			);
+		},
+		(sourceIndex, source, sourceContent) => {
+			while (sources.length < sourceIndex) {
+				sources.push(null);
+			}
+			sources[sourceIndex] = source;
+			if (sourceContent !== undefined) {
+				while (sourcesContent.length < sourceIndex) {
+					sourcesContent.push(null);
+				}
+				sourcesContent[sourceIndex] = sourceContent;
+			}
+			return onSource(sourceIndex, source, sourceContent);
+		},
+		(nameIndex, name) => {
+			while (names.length < nameIndex) {
+				names.push(null);
+			}
+			names[nameIndex] = name;
+			return onName(nameIndex, name);
+		}
+	);
+	const resultSource = source !== undefined ? source : code;
+	return {
+		result: {
+			generatedLine,
+			generatedColumn,
+			source: finalSource ? resultSource : undefined
+		},
+		source: resultSource,
+		map:
+			mappings.length > 0
+				? {
+						version: 3,
+						file: "x",
+						mappings,
+						sources,
+						sourcesContent:
+							sourcesContent.length > 0 ? sourcesContent : undefined,
+						names
+				  }
+				: null
+	};
+};
+
+module.exports = streamAndGetSourceAndMap;
diff --git a/node_modules/webpack-sources/lib/helpers/streamChunks.js b/node_modules/webpack-sources/lib/helpers/streamChunks.js
new file mode 100644
index 00000000..4bd3824a
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/streamChunks.js
@@ -0,0 +1,36 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const streamChunksOfRawSource = require("./streamChunksOfRawSource");
+const streamChunksOfSourceMap = require("./streamChunksOfSourceMap");
+
+module.exports = (source, options, onChunk, onSource, onName) => {
+	if (typeof source.streamChunks === "function") {
+		return source.streamChunks(options, onChunk, onSource, onName);
+	} else {
+		const sourceAndMap = source.sourceAndMap(options);
+		if (sourceAndMap.map) {
+			return streamChunksOfSourceMap(
+				sourceAndMap.source,
+				sourceAndMap.map,
+				onChunk,
+				onSource,
+				onName,
+				!!(options && options.finalSource),
+				!!(options && options.columns !== false)
+			);
+		} else {
+			return streamChunksOfRawSource(
+				sourceAndMap.source,
+				onChunk,
+				onSource,
+				onName,
+				!!(options && options.finalSource)
+			);
+		}
+	}
+};
diff --git a/node_modules/webpack-sources/lib/helpers/streamChunksOfCombinedSourceMap.js b/node_modules/webpack-sources/lib/helpers/streamChunksOfCombinedSourceMap.js
new file mode 100644
index 00000000..b40774d5
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/streamChunksOfCombinedSourceMap.js
@@ -0,0 +1,329 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const streamChunksOfSourceMap = require("./streamChunksOfSourceMap");
+const splitIntoLines = require("./splitIntoLines");
+
+const streamChunksOfCombinedSourceMap = (
+	source,
+	sourceMap,
+	innerSourceName,
+	innerSource,
+	innerSourceMap,
+	removeInnerSource,
+	onChunk,
+	onSource,
+	onName,
+	finalSource,
+	columns
+) => {
+	let sourceMapping = new Map();
+	let nameMapping = new Map();
+	const sourceIndexMapping = [];
+	const nameIndexMapping = [];
+	const nameIndexValueMapping = [];
+	let innerSourceIndex = -2;
+	const innerSourceIndexMapping = [];
+	const innerSourceIndexValueMapping = [];
+	const innerSourceContents = [];
+	const innerSourceContentLines = [];
+	const innerNameIndexMapping = [];
+	const innerNameIndexValueMapping = [];
+	const innerSourceMapLineData = [];
+	const findInnerMapping = (line, column) => {
+		if (line > innerSourceMapLineData.length) return -1;
+		const { mappingsData } = innerSourceMapLineData[line - 1];
+		let l = 0;
+		let r = mappingsData.length / 5;
+		while (l < r) {
+			let m = (l + r) >> 1;
+			if (mappingsData[m * 5] <= column) {
+				l = m + 1;
+			} else {
+				r = m;
+			}
+		}
+		if (l === 0) return -1;
+		return l - 1;
+	};
+	return streamChunksOfSourceMap(
+		source,
+		sourceMap,
+		(
+			chunk,
+			generatedLine,
+			generatedColumn,
+			sourceIndex,
+			originalLine,
+			originalColumn,
+			nameIndex
+		) => {
+			// Check if this is a mapping to the inner source
+			if (sourceIndex === innerSourceIndex) {
+				// Check if there is a mapping in the inner source
+				const idx = findInnerMapping(originalLine, originalColumn);
+				if (idx !== -1) {
+					const { chunks, mappingsData } = innerSourceMapLineData[
+						originalLine - 1
+					];
+					const mi = idx * 5;
+					const innerSourceIndex = mappingsData[mi + 1];
+					const innerOriginalLine = mappingsData[mi + 2];
+					let innerOriginalColumn = mappingsData[mi + 3];
+					let innerNameIndex = mappingsData[mi + 4];
+					if (innerSourceIndex >= 0) {
+						// Check for an identity mapping
+						// where we are allowed to adjust the original column
+						const innerChunk = chunks[idx];
+						const innerGeneratedColumn = mappingsData[mi];
+						const locationInChunk = originalColumn - innerGeneratedColumn;
+						if (locationInChunk > 0) {
+							let originalSourceLines =
+								innerSourceIndex < innerSourceContentLines.length
+									? innerSourceContentLines[innerSourceIndex]
+									: null;
+							if (originalSourceLines === undefined) {
+								const originalSource = innerSourceContents[innerSourceIndex];
+								originalSourceLines = originalSource
+									? splitIntoLines(originalSource)
+									: null;
+								innerSourceContentLines[innerSourceIndex] = originalSourceLines;
+							}
+							if (originalSourceLines !== null) {
+								const originalChunk =
+									innerOriginalLine <= originalSourceLines.length
+										? originalSourceLines[innerOriginalLine - 1].slice(
+												innerOriginalColumn,
+												innerOriginalColumn + locationInChunk
+										  )
+										: "";
+								if (innerChunk.slice(0, locationInChunk) === originalChunk) {
+									innerOriginalColumn += locationInChunk;
+									innerNameIndex = -1;
+								}
+							}
+						}
+
+						// We have a inner mapping to original source
+
+						// emit source when needed and compute global source index
+						let sourceIndex =
+							innerSourceIndex < innerSourceIndexMapping.length
+								? innerSourceIndexMapping[innerSourceIndex]
+								: -2;
+						if (sourceIndex === -2) {
+							const [source, sourceContent] =
+								innerSourceIndex < innerSourceIndexValueMapping.length
+									? innerSourceIndexValueMapping[innerSourceIndex]
+									: [null, undefined];
+							let globalIndex = sourceMapping.get(source);
+							if (globalIndex === undefined) {
+								sourceMapping.set(source, (globalIndex = sourceMapping.size));
+								onSource(globalIndex, source, sourceContent);
+							}
+							sourceIndex = globalIndex;
+							innerSourceIndexMapping[innerSourceIndex] = sourceIndex;
+						}
+
+						// emit name when needed and compute global name index
+						let finalNameIndex = -1;
+						if (innerNameIndex >= 0) {
+							// when we have a inner name
+							finalNameIndex =
+								innerNameIndex < innerNameIndexMapping.length
+									? innerNameIndexMapping[innerNameIndex]
+									: -2;
+							if (finalNameIndex === -2) {
+								const name =
+									innerNameIndex < innerNameIndexValueMapping.length
+										? innerNameIndexValueMapping[innerNameIndex]
+										: undefined;
+								if (name) {
+									let globalIndex = nameMapping.get(name);
+									if (globalIndex === undefined) {
+										nameMapping.set(name, (globalIndex = nameMapping.size));
+										onName(globalIndex, name);
+									}
+									finalNameIndex = globalIndex;
+								} else {
+									finalNameIndex = -1;
+								}
+								innerNameIndexMapping[innerNameIndex] = finalNameIndex;
+							}
+						} else if (nameIndex >= 0) {
+							// when we don't have an inner name,
+							// but we have an outer name
+							// it can be used when inner original code equals to the name
+							let originalSourceLines =
+								innerSourceContentLines[innerSourceIndex];
+							if (originalSourceLines === undefined) {
+								const originalSource = innerSourceContents[innerSourceIndex];
+								originalSourceLines = originalSource
+									? splitIntoLines(originalSource)
+									: null;
+								innerSourceContentLines[innerSourceIndex] = originalSourceLines;
+							}
+							if (originalSourceLines !== null) {
+								const name = nameIndexValueMapping[nameIndex];
+								const originalName =
+									innerOriginalLine <= originalSourceLines.length
+										? originalSourceLines[innerOriginalLine - 1].slice(
+												innerOriginalColumn,
+												innerOriginalColumn + name.length
+										  )
+										: "";
+								if (name === originalName) {
+									finalNameIndex =
+										nameIndex < nameIndexMapping.length
+											? nameIndexMapping[nameIndex]
+											: -2;
+									if (finalNameIndex === -2) {
+										const name = nameIndexValueMapping[nameIndex];
+										if (name) {
+											let globalIndex = nameMapping.get(name);
+											if (globalIndex === undefined) {
+												nameMapping.set(name, (globalIndex = nameMapping.size));
+												onName(globalIndex, name);
+											}
+											finalNameIndex = globalIndex;
+										} else {
+											finalNameIndex = -1;
+										}
+										nameIndexMapping[nameIndex] = finalNameIndex;
+									}
+								}
+							}
+						}
+						onChunk(
+							chunk,
+							generatedLine,
+							generatedColumn,
+							sourceIndex,
+							innerOriginalLine,
+							innerOriginalColumn,
+							finalNameIndex
+						);
+						return;
+					}
+				}
+
+				// We have a mapping to the inner source, but no inner mapping
+				if (removeInnerSource) {
+					onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
+					return;
+				} else {
+					if (sourceIndexMapping[sourceIndex] === -2) {
+						let globalIndex = sourceMapping.get(innerSourceName);
+						if (globalIndex === undefined) {
+							sourceMapping.set(source, (globalIndex = sourceMapping.size));
+							onSource(globalIndex, innerSourceName, innerSource);
+						}
+						sourceIndexMapping[sourceIndex] = globalIndex;
+					}
+				}
+			}
+
+			const finalSourceIndex =
+				sourceIndex < 0 || sourceIndex >= sourceIndexMapping.length
+					? -1
+					: sourceIndexMapping[sourceIndex];
+			if (finalSourceIndex < 0) {
+				// no source, so we make it a generated chunk
+				onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
+			} else {
+				// Pass through the chunk with mapping
+				let finalNameIndex = -1;
+				if (nameIndex >= 0 && nameIndex < nameIndexMapping.length) {
+					finalNameIndex = nameIndexMapping[nameIndex];
+					if (finalNameIndex === -2) {
+						const name = nameIndexValueMapping[nameIndex];
+						let globalIndex = nameMapping.get(name);
+						if (globalIndex === undefined) {
+							nameMapping.set(name, (globalIndex = nameMapping.size));
+							onName(globalIndex, name);
+						}
+						finalNameIndex = globalIndex;
+						nameIndexMapping[nameIndex] = finalNameIndex;
+					}
+				}
+				onChunk(
+					chunk,
+					generatedLine,
+					generatedColumn,
+					finalSourceIndex,
+					originalLine,
+					originalColumn,
+					finalNameIndex
+				);
+			}
+		},
+		(i, source, sourceContent) => {
+			if (source === innerSourceName) {
+				innerSourceIndex = i;
+				if (innerSource !== undefined) sourceContent = innerSource;
+				else innerSource = sourceContent;
+				sourceIndexMapping[i] = -2;
+				streamChunksOfSourceMap(
+					sourceContent,
+					innerSourceMap,
+					(
+						chunk,
+						generatedLine,
+						generatedColumn,
+						sourceIndex,
+						originalLine,
+						originalColumn,
+						nameIndex
+					) => {
+						while (innerSourceMapLineData.length < generatedLine) {
+							innerSourceMapLineData.push({
+								mappingsData: [],
+								chunks: []
+							});
+						}
+						const data = innerSourceMapLineData[generatedLine - 1];
+						data.mappingsData.push(
+							generatedColumn,
+							sourceIndex,
+							originalLine,
+							originalColumn,
+							nameIndex
+						);
+						data.chunks.push(chunk);
+					},
+					(i, source, sourceContent) => {
+						innerSourceContents[i] = sourceContent;
+						innerSourceContentLines[i] = undefined;
+						innerSourceIndexMapping[i] = -2;
+						innerSourceIndexValueMapping[i] = [source, sourceContent];
+					},
+					(i, name) => {
+						innerNameIndexMapping[i] = -2;
+						innerNameIndexValueMapping[i] = name;
+					},
+					false,
+					columns
+				);
+			} else {
+				let globalIndex = sourceMapping.get(source);
+				if (globalIndex === undefined) {
+					sourceMapping.set(source, (globalIndex = sourceMapping.size));
+					onSource(globalIndex, source, sourceContent);
+				}
+				sourceIndexMapping[i] = globalIndex;
+			}
+		},
+		(i, name) => {
+			nameIndexMapping[i] = -2;
+			nameIndexValueMapping[i] = name;
+		},
+		finalSource,
+		columns
+	);
+};
+
+module.exports = streamChunksOfCombinedSourceMap;
diff --git a/node_modules/webpack-sources/lib/helpers/streamChunksOfRawSource.js b/node_modules/webpack-sources/lib/helpers/streamChunksOfRawSource.js
new file mode 100644
index 00000000..133022a9
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/streamChunksOfRawSource.js
@@ -0,0 +1,34 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const getGeneratedSourceInfo = require("./getGeneratedSourceInfo");
+const splitIntoLines = require("./splitIntoLines");
+
+const streamChunksOfRawSource = (source, onChunk, onSource, onName) => {
+	let line = 1;
+	const matches = splitIntoLines(source);
+	let match;
+	for (match of matches) {
+		onChunk(match, line, 0, -1, -1, -1, -1);
+		line++;
+	}
+	return matches.length === 0 || match.endsWith("\n")
+		? {
+				generatedLine: matches.length + 1,
+				generatedColumn: 0
+		  }
+		: {
+				generatedLine: matches.length,
+				generatedColumn: match.length
+		  };
+};
+
+module.exports = (source, onChunk, onSource, onName, finalSource) => {
+	return finalSource
+		? getGeneratedSourceInfo(source)
+		: streamChunksOfRawSource(source, onChunk, onSource, onName);
+};
diff --git a/node_modules/webpack-sources/lib/helpers/streamChunksOfSourceMap.js b/node_modules/webpack-sources/lib/helpers/streamChunksOfSourceMap.js
new file mode 100644
index 00000000..c57cb34b
--- /dev/null
+++ b/node_modules/webpack-sources/lib/helpers/streamChunksOfSourceMap.js
@@ -0,0 +1,412 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const getGeneratedSourceInfo = require("./getGeneratedSourceInfo");
+const getSource = require("./getSource");
+const readMappings = require("./readMappings");
+const splitIntoLines = require("./splitIntoLines");
+
+const streamChunksOfSourceMapFull = (
+	source,
+	sourceMap,
+	onChunk,
+	onSource,
+	onName
+) => {
+	const lines = splitIntoLines(source);
+	if (lines.length === 0) {
+		return {
+			generatedLine: 1,
+			generatedColumn: 0
+		};
+	}
+	const { sources, sourcesContent, names, mappings } = sourceMap;
+	for (let i = 0; i < sources.length; i++) {
+		onSource(
+			i,
+			getSource(sourceMap, i),
+			(sourcesContent && sourcesContent[i]) || undefined
+		);
+	}
+	if (names) {
+		for (let i = 0; i < names.length; i++) {
+			onName(i, names[i]);
+		}
+	}
+
+	const lastLine = lines[lines.length - 1];
+	const lastNewLine = lastLine.endsWith("\n");
+	const finalLine = lastNewLine ? lines.length + 1 : lines.length;
+	const finalColumn = lastNewLine ? 0 : lastLine.length;
+
+	let currentGeneratedLine = 1;
+	let currentGeneratedColumn = 0;
+
+	let mappingActive = false;
+	let activeMappingSourceIndex = -1;
+	let activeMappingOriginalLine = -1;
+	let activeMappingOriginalColumn = -1;
+	let activeMappingNameIndex = -1;
+
+	const onMapping = (
+		generatedLine,
+		generatedColumn,
+		sourceIndex,
+		originalLine,
+		originalColumn,
+		nameIndex
+	) => {
+		if (mappingActive && currentGeneratedLine <= lines.length) {
+			let chunk;
+			const mappingLine = currentGeneratedLine;
+			const mappingColumn = currentGeneratedColumn;
+			const line = lines[currentGeneratedLine - 1];
+			if (generatedLine !== currentGeneratedLine) {
+				chunk = line.slice(currentGeneratedColumn);
+				currentGeneratedLine++;
+				currentGeneratedColumn = 0;
+			} else {
+				chunk = line.slice(currentGeneratedColumn, generatedColumn);
+				currentGeneratedColumn = generatedColumn;
+			}
+			if (chunk) {
+				onChunk(
+					chunk,
+					mappingLine,
+					mappingColumn,
+					activeMappingSourceIndex,
+					activeMappingOriginalLine,
+					activeMappingOriginalColumn,
+					activeMappingNameIndex
+				);
+			}
+			mappingActive = false;
+		}
+		if (generatedLine > currentGeneratedLine && currentGeneratedColumn > 0) {
+			if (currentGeneratedLine <= lines.length) {
+				const chunk = lines[currentGeneratedLine - 1].slice(
+					currentGeneratedColumn
+				);
+				onChunk(
+					chunk,
+					currentGeneratedLine,
+					currentGeneratedColumn,
+					-1,
+					-1,
+					-1,
+					-1
+				);
+			}
+			currentGeneratedLine++;
+			currentGeneratedColumn = 0;
+		}
+		while (generatedLine > currentGeneratedLine) {
+			if (currentGeneratedLine <= lines.length) {
+				onChunk(
+					lines[currentGeneratedLine - 1],
+					currentGeneratedLine,
+					0,
+					-1,
+					-1,
+					-1,
+					-1
+				);
+			}
+			currentGeneratedLine++;
+		}
+		if (generatedColumn > currentGeneratedColumn) {
+			if (currentGeneratedLine <= lines.length) {
+				const chunk = lines[currentGeneratedLine - 1].slice(
+					currentGeneratedColumn,
+					generatedColumn
+				);
+				onChunk(
+					chunk,
+					currentGeneratedLine,
+					currentGeneratedColumn,
+					-1,
+					-1,
+					-1,
+					-1
+				);
+			}
+			currentGeneratedColumn = generatedColumn;
+		}
+		if (
+			sourceIndex >= 0 &&
+			(generatedLine < finalLine ||
+				(generatedLine === finalLine && generatedColumn < finalColumn))
+		) {
+			mappingActive = true;
+			activeMappingSourceIndex = sourceIndex;
+			activeMappingOriginalLine = originalLine;
+			activeMappingOriginalColumn = originalColumn;
+			activeMappingNameIndex = nameIndex;
+		}
+	};
+	readMappings(mappings, onMapping);
+	onMapping(finalLine, finalColumn, -1, -1, -1, -1);
+	return {
+		generatedLine: finalLine,
+		generatedColumn: finalColumn
+	};
+};
+
+const streamChunksOfSourceMapLinesFull = (
+	source,
+	sourceMap,
+	onChunk,
+	onSource,
+	_onName
+) => {
+	const lines = splitIntoLines(source);
+	if (lines.length === 0) {
+		return {
+			generatedLine: 1,
+			generatedColumn: 0
+		};
+	}
+	const { sources, sourcesContent, mappings } = sourceMap;
+	for (let i = 0; i < sources.length; i++) {
+		onSource(
+			i,
+			getSource(sourceMap, i),
+			(sourcesContent && sourcesContent[i]) || undefined
+		);
+	}
+
+	let currentGeneratedLine = 1;
+
+	const onMapping = (
+		generatedLine,
+		_generatedColumn,
+		sourceIndex,
+		originalLine,
+		originalColumn,
+		_nameIndex
+	) => {
+		if (
+			sourceIndex < 0 ||
+			generatedLine < currentGeneratedLine ||
+			generatedLine > lines.length
+		) {
+			return;
+		}
+		while (generatedLine > currentGeneratedLine) {
+			if (currentGeneratedLine <= lines.length) {
+				onChunk(
+					lines[currentGeneratedLine - 1],
+					currentGeneratedLine,
+					0,
+					-1,
+					-1,
+					-1,
+					-1
+				);
+			}
+			currentGeneratedLine++;
+		}
+		if (generatedLine <= lines.length) {
+			onChunk(
+				lines[generatedLine - 1],
+				generatedLine,
+				0,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				-1
+			);
+			currentGeneratedLine++;
+		}
+	};
+	readMappings(mappings, onMapping);
+	for (; currentGeneratedLine <= lines.length; currentGeneratedLine++) {
+		onChunk(
+			lines[currentGeneratedLine - 1],
+			currentGeneratedLine,
+			0,
+			-1,
+			-1,
+			-1,
+			-1
+		);
+	}
+
+	const lastLine = lines[lines.length - 1];
+	const lastNewLine = lastLine.endsWith("\n");
+
+	const finalLine = lastNewLine ? lines.length + 1 : lines.length;
+	const finalColumn = lastNewLine ? 0 : lastLine.length;
+
+	return {
+		generatedLine: finalLine,
+		generatedColumn: finalColumn
+	};
+};
+
+const streamChunksOfSourceMapFinal = (
+	source,
+	sourceMap,
+	onChunk,
+	onSource,
+	onName
+) => {
+	const result = getGeneratedSourceInfo(source);
+	const { generatedLine: finalLine, generatedColumn: finalColumn } = result;
+
+	if (finalLine === 1 && finalColumn === 0) return result;
+	const { sources, sourcesContent, names, mappings } = sourceMap;
+	for (let i = 0; i < sources.length; i++) {
+		onSource(
+			i,
+			getSource(sourceMap, i),
+			(sourcesContent && sourcesContent[i]) || undefined
+		);
+	}
+	if (names) {
+		for (let i = 0; i < names.length; i++) {
+			onName(i, names[i]);
+		}
+	}
+
+	let mappingActiveLine = 0;
+
+	const onMapping = (
+		generatedLine,
+		generatedColumn,
+		sourceIndex,
+		originalLine,
+		originalColumn,
+		nameIndex
+	) => {
+		if (
+			generatedLine >= finalLine &&
+			(generatedColumn >= finalColumn || generatedLine > finalLine)
+		) {
+			return;
+		}
+		if (sourceIndex >= 0) {
+			onChunk(
+				undefined,
+				generatedLine,
+				generatedColumn,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				nameIndex
+			);
+			mappingActiveLine = generatedLine;
+		} else if (mappingActiveLine === generatedLine) {
+			onChunk(undefined, generatedLine, generatedColumn, -1, -1, -1, -1);
+			mappingActiveLine = 0;
+		}
+	};
+	readMappings(mappings, onMapping);
+	return result;
+};
+
+const streamChunksOfSourceMapLinesFinal = (
+	source,
+	sourceMap,
+	onChunk,
+	onSource,
+	_onName
+) => {
+	const result = getGeneratedSourceInfo(source);
+	const { generatedLine, generatedColumn } = result;
+	if (generatedLine === 1 && generatedColumn === 0) {
+		return {
+			generatedLine: 1,
+			generatedColumn: 0
+		};
+	}
+
+	const { sources, sourcesContent, mappings } = sourceMap;
+	for (let i = 0; i < sources.length; i++) {
+		onSource(
+			i,
+			getSource(sourceMap, i),
+			(sourcesContent && sourcesContent[i]) || undefined
+		);
+	}
+
+	const finalLine = generatedColumn === 0 ? generatedLine - 1 : generatedLine;
+
+	let currentGeneratedLine = 1;
+
+	const onMapping = (
+		generatedLine,
+		_generatedColumn,
+		sourceIndex,
+		originalLine,
+		originalColumn,
+		_nameIndex
+	) => {
+		if (
+			sourceIndex >= 0 &&
+			currentGeneratedLine <= generatedLine &&
+			generatedLine <= finalLine
+		) {
+			onChunk(
+				undefined,
+				generatedLine,
+				0,
+				sourceIndex,
+				originalLine,
+				originalColumn,
+				-1
+			);
+			currentGeneratedLine = generatedLine + 1;
+		}
+	};
+	readMappings(mappings, onMapping);
+	return result;
+};
+
+module.exports = (
+	source,
+	sourceMap,
+	onChunk,
+	onSource,
+	onName,
+	finalSource,
+	columns
+) => {
+	if (columns) {
+		return finalSource
+			? streamChunksOfSourceMapFinal(
+					source,
+					sourceMap,
+					onChunk,
+					onSource,
+					onName
+			  )
+			: streamChunksOfSourceMapFull(
+					source,
+					sourceMap,
+					onChunk,
+					onSource,
+					onName
+			  );
+	} else {
+		return finalSource
+			? streamChunksOfSourceMapLinesFinal(
+					source,
+					sourceMap,
+					onChunk,
+					onSource,
+					onName
+			  )
+			: streamChunksOfSourceMapLinesFull(
+					source,
+					sourceMap,
+					onChunk,
+					onSource,
+					onName
+			  );
+	}
+};
diff --git a/node_modules/webpack-sources/lib/index.js b/node_modules/webpack-sources/lib/index.js
new file mode 100644
index 00000000..0c11c2f4
--- /dev/null
+++ b/node_modules/webpack-sources/lib/index.js
@@ -0,0 +1,30 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+const defineExport = (name, fn) => {
+	let value;
+	Object.defineProperty(exports, name, {
+		get: () => {
+			if (fn !== undefined) {
+				value = fn();
+				fn = undefined;
+			}
+			return value;
+		},
+		configurable: true
+	});
+};
+
+defineExport("Source", () => require("./Source"));
+
+defineExport("RawSource", () => require("./RawSource"));
+defineExport("OriginalSource", () => require("./OriginalSource"));
+defineExport("SourceMapSource", () => require("./SourceMapSource"));
+defineExport("CachedSource", () => require("./CachedSource"));
+defineExport("ConcatSource", () => require("./ConcatSource"));
+defineExport("ReplaceSource", () => require("./ReplaceSource"));
+defineExport("PrefixSource", () => require("./PrefixSource"));
+defineExport("SizeOnlySource", () => require("./SizeOnlySource"));
+defineExport("CompatSource", () => require("./CompatSource"));