Code coverage badge

Author: DivineOmega

README.md

@@ -1,6 +1,7 @@
 # 🐪💼 PHP Camel Caser
 
 [![Build Status](https://travis-ci.org/DivineOmega/php-camel-caser.svg?branch=master)](https://travis-ci.org/DivineOmega/php-camel-caser)
+[![Coverage Status](https://coveralls.io/repos/github/DivineOmega/php-camel-caser/badge.svg?branch=master)](https://coveralls.io/github/DivineOmega/php-camel-caser?branch=master)
 [![StyleCI](https://github.styleci.io/repos/147511192/shield?branch=master)](https://github.styleci.io/repos/147511192)
 [![Packagist](https://img.shields.io/packagist/dt/divineomega/php-camel-caser.svg)](https://packagist.org/packages/divineomega/php-camel-caser/stats)