docs(readme): Updates coverage badge

Author: joshwiens

README.md

@@ -1,8 +1,6 @@
-[![npm][npm]][npm-url]
-[![node][node]][node-url]
-[![deps][deps]][deps-url]
 [![tests][tests]][tests-url]
 [![coverage][cover]][cover-url]
+[![npm][npm]][npm-url]
 [![chat][chat]][chat-url]
 
 <div align="center">
@@ -149,17 +147,11 @@ Set the MIME type for the file. If unspecified the file extensions will be used
 [npm]: https://img.shields.io/npm/v/url-loader.svg
 [npm-url]: https://npmjs.com/package/url-loader
 
-[node]: https://img.shields.io/node/v/url-loader.svg
-[node-url]: https://nodejs.org
-
-[deps]: https://david-dm.org/webpack-contrib/url-loader.svg
-[deps-url]: https://david-dm.org/webpack-contrib/url-loader
-
 [tests]: https://circleci.com/gh/webpack-contrib/url-loader/tree/master.svg?style=svg
 [tests-url]: https://circleci.com/gh/webpack-contrib/url-loader/tree/master
 
-[cover]: https://coveralls.io/repos/github/webpack-contrib/url-loader/badge.svg
-[cover-url]: https://coveralls.io/github/webpack-contrib/url-loader
+[cover]: https://codecov.io/gh/webpack-contrib/url-loader/branch/master/graph/badge.svg
+[cover-url]: https://codecov.io/gh/webpack-contrib/url-loader
 
 [chat]: https://badges.gitter.im/webpack/webpack.svg
 [chat-url]: https://gitter.im/webpack/webpack