Link the PHP version badge to the composer.json

Author: nicwortel

README.md

@@ -2,7 +2,7 @@
 
 [![Build status](https://img.shields.io/travis/leviy/php-coding-standard.svg)](https://travis-ci.org/leviy/php-coding-standard)
 [![Packagist version](https://img.shields.io/packagist/v/leviy/coding-standard.svg)](https://packagist.org/packages/leviy/coding-standard)
-![PHP from Packagist](https://img.shields.io/packagist/php-v/leviy/coding-standard.svg)
+[![PHP from Packagist](https://img.shields.io/packagist/php-v/leviy/coding-standard.svg)](https://github.com/leviy/php-coding-standard/blob/master/composer.json)
 
 The LEVIY coding standard for PHP code, including a PHPCS ruleset.