update readme. add some badges

Author: inhere

README.md

@@ -1,11 +1,17 @@
-# array utils for php
+# array utils
+
+[![License](https://img.shields.io/packagist/l/php-toolkit/arr-utils.svg?style=flat-square)](LICENSE)
+[![Php Version](https://img.shields.io/badge/php-%3E=7.1.0-brightgreen.svg?maxAge=2592000)](https://packagist.org/packages/php-toolkit/arr-utils)
+[![Latest Stable Version](http://img.shields.io/packagist/v/php-toolkit/arr-utils.svg)](https://packagist.org/packages/php-toolkit/arr-utils)
+
+Some useful array utils for php
 
 ## Install
 
 ```bash
 composer require toolkit/arr-utils
 ```
 
-## license
+## License
 
 MIT