update devDependencies

Highlight: switch from nyc to coverage https://github.com/shinnn/coverage

Author: shinnn

.gitattributes

@@ -1 +1 @@
-* text=auto
+* text=auto eol=lf

.travis.yml

@@ -2,4 +2,3 @@ if: branch !~ ^v\d
 dist: xenial
 language: node_js
 node_js: node
-after_script: node_modules/.bin/nyc report | npx coveralls

LICENSE

@@ -1,5 +1,5 @@
 ISC License (ISC)
-Copyright 2017 Shinnosuke Watanabe
+Copyright 2017 - 2019 Shinnosuke Watanabe
 
 Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
 

README.md

@@ -2,16 +2,17 @@
 
 [![npm version](https://img.shields.io/npm/v/clean-css-promise.svg)](https://www.npmjs.com/package/clean-css-promise)
 [![Build Status](https://travis-ci.com/shinnn/clean-css-promise.svg?branch=master)](https://travis-ci.com/shinnn/clean-css-promise)
-[![Coverage Status](https://img.shields.io/coveralls/shinnn/clean-css-promise.svg)](https://coveralls.io/github/shinnn/clean-css-promise?branch=master)
+[![codecov](https://codecov.io/gh/shinnn/clean-css-promise/branch/master/graph/badge.svg)](https://codecov.io/gh/shinnn/clean-css-promise)
 
 [clean-css](https://github.com/jakubpawlowicz/clean-css) with the default [Promise](https://developer.mozilla.org/docs/Mozilla/JavaScript_code_modules/Promise.jsm/Promise) interface and some improvements
 
 ```javascript
 const CleanCssPromise = require('clean-css-promise');
 
-new CleanCssPromise()
-.minify('p { margin: 1px 1px 1px 1px; }')
-.then(({styles}) => console.log(styles)) //=> p{margin:1px}
+(async () => {
+  const {styles} = new CleanCssPromise().minify('p { margin: 1px 1px 1px 1px; }');
+  //=> p{margin:1px}
+})();
 ```
 
 ## Installation
@@ -55,4 +56,4 @@ clean-css dangerously ignores these errors but clean-css-promise doesn't, becaus
 
 ## License
 
-[ISC License](./LICENSE) © 2017 - 2018 Shinnosuke Watanabe
+[ISC License](./LICENSE) © 2017 - 2019 Shinnosuke Watanabe