docs(coverage-badge): added a coverage badge

Author: travi

README.md

@@ -4,7 +4,8 @@ hapi route to delegate routing for html content to react-router
 
 [![npm](https://img.shields.io/npm/v/@travi/hapi-react-router.svg?maxAge=2592000)](https://www.npmjs.com/package/@travi/hapi-react-router)
 [![license](https://img.shields.io/github/license/travi/hapi-react-router.svg)](LICENSE)
-[![Build Status](https://img.shields.io/travis/travi/hapi-react-router.svg?style=flat)](https://travis-ci.org/travi/hapi-react-router)
+[![Build Status](https://img.shields.io/travis/travi/hapi-react-router.svg?style=flat&branch=master)](https://travis-ci.org/travi/hapi-react-router)
+[![Codecov](https://img.shields.io/codecov/c/github/travi/hapi-react-router.svg)](https://codecov.io/github/travi/hapi-react-router)
 
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
 [![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)