Add notice about lumen

Author: vinkla

README.md

@@ -2,7 +2,7 @@
 
 ![oauth2-server-laravel](https://cloud.githubusercontent.com/assets/499192/9065550/751404ba-3ad2-11e5-9f92-3d4d5d4b9c54.png)
 
-[OAuth 2.0](http://tools.ietf.org/wg/oauth/draft-ietf-oauth-v2/) authorization server and resource server for the Laravel framework. Standard compliant thanks to the amazing work by [The League of Extraordinary Packages](http://www.thephpleague.com) OAuth 2.0 authorization server and resource server.
+[OAuth 2.0](http://tools.ietf.org/wg/oauth/draft-ietf-oauth-v2/) authorization server and resource server for the Laravel and Lumen frameworks. Standard compliant thanks to the amazing work by [The League of Extraordinary Packages](http://www.thephpleague.com) OAuth 2.0 authorization server and resource server.
 
 [![Latest Version](http://img.shields.io/github/release/lucadegasperi/oauth2-server-laravel.svg?style=flat-square)](https://github.com/lucadegasperi/oauth2-server-laravel/releases)
 [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)