updated README

Author: vyuldashev

README.md

@@ -64,5 +64,5 @@ Unit tests will be provided soon.
 You can contribute to this package by discovering bugs and opening issues. Enjoy!
 
 ####Supported versions of Laravel
-4.0, 4.1, 4.2, 5.0
+4.0, 4.1, 4.2, 5.0, 5.1
 The version is being matched by the release tag of this library.