Update README.md

Author: harishanchu

README.md

@@ -1,7 +1,7 @@
 Laravel-FTP
 ===========
 
-A simple Laravel 5 ftp service provider.
+A simple Laravel 5/6/7 ftp service provider.
 
 [![Latest Stable Version](https://poser.pugx.org/anchu/ftp/v/stable)](https://packagist.org/packages/anchu/ftp)
 [![Build Status](https://travis-ci.org/harishanchu/Laravel-FTP.png?branch=master)](https://travis-ci.org/harishanchu/Laravel-FTP)