Infection badge added to readme

Author: remorhaz

README.md

@@ -1,10 +1,11 @@
 # PHP JSON Patch
 
 [![Latest Stable Version](https://poser.pugx.org/remorhaz/php-json-patch/v/stable)](https://packagist.org/packages/remorhaz/php-json-patch)
-[![License](https://poser.pugx.org/remorhaz/php-json-patch/license)](https://packagist.org/packages/remorhaz/php-json-patch)
 [![Build Status](https://travis-ci.org/remorhaz/php-json-patch.svg?branch=master)](https://travis-ci.org/remorhaz/php-json-patch)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/remorhaz/php-json-patch/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/remorhaz/php-json-patch/?branch=master)
 [![codecov](https://codecov.io/gh/remorhaz/php-json-patch/branch/master/graph/badge.svg)](https://codecov.io/gh/remorhaz/php-json-patch)
+[![Infection MSI](https://badge.stryker-mutator.io/github.com/remorhaz/php-json-patch/master)](https://infection.github.io)
+[![License](https://poser.pugx.org/remorhaz/php-json-patch/license)](https://packagist.org/packages/remorhaz/php-json-patch)
 
 This library implements [RFC6902](https://tools.ietf.org/html/rfc6902)-compliant JSON patch tool.