updates

1 files changed, 36 insertions, 54 deletions

diff --git a/node_modules/postcss-calc/README.md b/node_modules/postcss-calc/README.md
index 4cabf731..2c207402 100755
--- a/node_modules/postcss-calc/README.md
+++ b/node_modules/postcss-calc/README.md
@@ -1,16 +1,16 @@
-# postcss-calc [![Build Status](https://travis-ci.org/postcss/postcss-calc.png)](https://travis-ci.org/postcss/postcss-calc)
+# PostCSS Calc [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS" width="90" height="90" align="right">][PostCSS]
 
-> [PostCSS](https://github.com/postcss/postcss) plugin to reduce `calc()`.
+[![NPM Version][npm-img]][npm-url]
+[![Support Chat][git-img]][git-url]
 
-This plugin reduce `calc()` references whenever it's possible.
-This can be particularly useful with the [postcss-custom-properties](https://github.com/postcss/postcss-custom-properties) plugin.
-
-**Note:** When multiple units are mixed together in the same expression, the `calc()` statement is left as is, to fallback to the [w3c calc() feature](http://www.w3.org/TR/css3-values/#calc).
+[PostCSS Calc] lets you reduce `calc()` references whenever it's possible.
+When multiple units are mixed together in the same expression, the `calc()`
+statement is left as is, to fallback to the [W3C calc() implementation].
 
 ## Installation
 
-```console
-$ npm install postcss-calc
+```bash
+npm install postcss-calc
 ```
 
 ## Usage
@@ -31,62 +31,28 @@ var output = postcss()
   .css
 ```
 
-**Example** (with [postcss-custom-properties](https://github.com/postcss/postcss-custom-properties) enabled as well):
-
-```js
-// dependencies
-var fs = require("fs")
-var postcss = require("postcss")
-var customProperties = require("postcss-custom-properties")
-var calc = require("postcss-calc")
-
-// css to be processed
-var css = fs.readFileSync("input.css", "utf8")
-
-// process css
-var output = postcss()
-  .use(customProperties())
-  .use(calc())
-  .process(css)
-  .css
-```
-
 Using this `input.css`:
 
 ```css
-:root {
-  --main-font-size: 16px;
-}
-
-body {
-  font-size: var(--main-font-size);
-}
-
 h1 {
-  font-size: calc(var(--main-font-size) * 2);
+  font-size: calc(16px * 2);
   height: calc(100px - 2em);
-  margin-bottom: calc(
-      var(--main-font-size)
-      * 1.5
-    )
+  width: calc(2*var(--base-width));
+  margin-bottom: calc(16px * 1.5);
 }
 ```
 
 you will get:
 
 ```css
-body {
-  font-size: 16px
-}
-
 h1 {
   font-size: 32px;
   height: calc(100px - 2em);
+  width: calc(2*var(--base-width));
   margin-bottom: 24px
 }
 ```
-
-Checkout [tests](src/__tests__/index.js) for more examples.
+Checkout [tests] for more examples.
 
 ### Options
 
@@ -103,7 +69,8 @@ var out = postcss()
 
 #### `preserve` (default: `false`)
 
-Allow you to preserve calc() usage in output so browsers will handle decimal precision themselves.
+Allow you to preserve calc() usage in output so browsers will handle decimal
+precision themselves.
 
 ```js
 var out = postcss()
@@ -155,17 +122,32 @@ div[data-size="calc(3*3)"] {
 
 ---
 
+## Related PostCSS plugins
+To replace the value of CSS custom properties at build time, try [PostCSS Custom Properties].
+
 ## Contributing
 
-Work on a branch, install dev-dependencies, respect coding style & run tests before submitting a bug fix or a feature.
+Work on a branch, install dev-dependencies, respect coding style & run tests
+before submitting a bug fix or a feature.
 
-```console
-$ git clone https://github.com/postcss/postcss-calc.git
-$ git checkout -b patch-1
-$ npm install
-$ npm test
+```bash
+git clone git@github.com:postcss/postcss-calc.git
+git checkout -b patch-1
+npm install
+npm test
 ```
 
 ## [Changelog](CHANGELOG.md)
 
 ## [License](LICENSE)
+
+[git-img]: https://img.shields.io/badge/support-chat-blue.svg
+[git-url]: https://gitter.im/postcss/postcss
+[npm-img]: https://img.shields.io/npm/v/postcss-calc.svg
+[npm-url]: https://www.npmjs.com/package/postcss-calc
+
+[PostCSS]: https://github.com/postcss
+[PostCSS Calc]: https://github.com/postcss/postcss-calc
+[PostCSS Custom Properties]: https://github.com/postcss/postcss-custom-properties
+[tests]: src/__tests__/index.js
+[W3C calc() implementation]: https://www.w3.org/TR/css3-values/#calc-notation