Update README.md

Author: rkrx

README.md

@@ -2,6 +2,7 @@ mysql query builder (php 5.4+)
 ==============================
 
 [![Build Status](https://travis-ci.org/rkrx/php-mysql-query-builder.svg)](https://travis-ci.org/rkrx/php-mysql-query-builder)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/rkrx/php-mysql-query-builder/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/rkrx/php-mysql-query-builder/?branch=master)
 
 Simple mysql query builder to build select, insert, update and delete queries with conditional parts.
 This library was initially not intended to build prepared statements, but this is also possible.