Mark base controller as abstract

Author: laravel-shift

app/Http/Controllers/Controller.php

@@ -17,7 +17,7 @@
 use Illuminate\Foundation\Validation\ValidatesRequests;
 use Illuminate\Routing\Controller as BaseController;
 
-class Controller extends BaseController
+abstract class Controller extends BaseController
 {
     use AuthorizesRequests;
     use ValidatesRequests;