Add Laravel DataTables 9.x on requirements

Author: jaydons

README.md

@@ -12,6 +12,7 @@ This package is a plugin of [Laravel DataTables](https://github.com/yajra/larave
 ## Requirements
 - [PHP >=7.0](http://php.net/)
 - [Laravel 5.x](https://github.com/laravel/framework)
+- [Laravel DataTables 9.x](https://github.com/yajra/laravel-datatables)
 - [jQuery DataTables v1.10.x](http://datatables.net/)
 - [jQuery DataTables Buttons Extension](https://datatables.net/reference/button/)