docs(codecov): update badge

Author: jedwards1211

README.md

@@ -1,7 +1,7 @@
 # es2015-library-skeleton
 
 [![Build Status](https://travis-ci.org/jedwards1211/es2015-library-skeleton.svg?branch=master)](https://travis-ci.org/jedwards1211/es2015-library-skeleton)
-[![Coverage Status](https://coveralls.io/repos/github/jedwards1211/es2015-library-skeleton/badge.svg?branch=master)](https://coveralls.io/github/jedwards1211/es2015-library-skeleton?branch=master)
+[![Coverage Status](https://codecov.io/gh/jedwards1211/es2015-library-skeleton/branch/master/graph/badge.svg)](https://codecov.io/gh/jedwards1211/es2015-library-skeleton)]
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
 

TEMPLATE-README.md

@@ -1,7 +1,7 @@
 # {{ name }}
 
 [![Build Status](https://travis-ci.org/{{ organization }}/{{ name }}.svg?branch=master)](https://travis-ci.org/{{ organization }}/{{ name }})
-[![Coverage Status](https://coveralls.io/repos/github/{{ organization }}/{{ name }}/badge.svg?branch=master)](https://coveralls.io/github/{{ organization }}/{{ name }}?branch=master)
+[![Coverage Status](https://codecov.io/gh/{{ organization }}/{{ name }}/branch/master/graph/badge.svg)](https://codecov.io/gh/{{ organization }}/{{ name }})]
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)