Added shields to readme

Author: korridor

readme.md

@@ -1,5 +1,10 @@
 # Laravel model validation rules
 
+[![Latest Version on Packagist](https://img.shields.io/packagist/v/korridor/laravel-model-validation-rules?style=flat-square)](https://packagist.org/packages/korridor/laravel-model-validation-rules)
+[![License](https://img.shields.io/packagist/l/korridor/laravel-model-validation-rules?style=flat-square)](license.md)
+[![TravisCI](https://img.shields.io/travis/korridor/laravel-model-validation-rules?style=flat-square)](https://travis-ci.org/korridor/laravel-model-validation-rules)
+[![StyleCI](https://styleci.io/repos/208495858/shield)](https://styleci.io/repos/208495858)
+
 This package is an alternative to the Laravel built-in validation rules `exist` and `unique`.
 This has the following advantages: