✨ add shields to documentation

A number of important and informative data about this repository are now displayed at the top of the README.md file. Made possible by shields.io.

README.md

@@ -1,3 +1,6 @@
+[![Latest Stable Version](https://img.shields.io/github/v/release/proxeuse/fortify-tabler?style=flat-square)](https://packagist.org/packages/proxeuse/fortify-tabler) [![Total Downloads](https://img.shields.io/packagist/dt/proxeuse/fortify-tabler?style=flat-square)](https://packagist.org/packages/proxeuse/fortify-tabler) [![PHP Version Support](https://img.shields.io/packagist/php-v/proxeuse/fortify-tabler?style=flat-square)](https://packagist.org/packages/proxeuse/fortify-tabler)
+[![License](https://img.shields.io/github/license/Proxeuse/fortify-tabler?style=flat-square)](https://github.com/Proxeuse/fortify-tabler/blob/master/LICENSE.md)
+
 <p align="center"><img width="400" src="https://github.com/Proxeuse/fortify-tabler/raw/master/fortify-tabler.png"></p>
 
 # Introduction