update readme. add some badges

Author: inhere

README.md

@@ -1,6 +1,12 @@
-# object utils for php
+# object utils
 
-## install
+[![License](https://img.shields.io/packagist/l/php-toolkit/obj-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/obj-utils)
+[![Latest Stable Version](http://img.shields.io/packagist/v/php-toolkit/obj-utils.svg)](https://packagist.org/packages/php-toolkit/obj-utils)
+
+Some useful object utils for the php.
+
+## Install
 
 ```bash
 composer require toolkit/obj-utils