added codecov badge

Author: Sergiu

README.md

@@ -3,14 +3,15 @@
 This package contains controller like middleware to be used inside a DotKernel or Mezzio application. It provides base classes for action based controllers similar to Laminas controller component. It is more lightweight though, but supports controller plugins.
 
 ![OSS Lifecycle](https://img.shields.io/osslifecycle/dotkernel/dot-controller)
-![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/dot-controller/3.4.1)
+![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/dot-controller/3.4.2)
 
 [![GitHub issues](https://img.shields.io/github/issues/dotkernel/dot-controller)](https://github.com/dotkernel/dot-controller/issues)
 [![GitHub forks](https://img.shields.io/github/forks/dotkernel/dot-controller)](https://github.com/dotkernel/dot-controller/network)
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 [![GitHub license](https://img.shields.io/github/license/dotkernel/dot-controller)](https://github.com/dotkernel/dot-controller/blob/3.0/LICENSE.md)
 
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+[![codecov](https://codecov.io/gh/dotkernel/dot-controller/graph/badge.svg?token=VUBG5LM4CK)](https://codecov.io/gh/dotkernel/dot-controller)
 
 [![SymfonyInsight](https://insight.symfony.com/projects/c4aac671-40d7-4590-b1fa-b3e46a1e3f43/big.svg)](https://insight.symfony.com/projects/c4aac671-40d7-4590-b1fa-b3e46a1e3f43)