Use the ::class notation

Updated to use ::class notation.

database/seeds/DatabaseSeeder.php

@@ -14,7 +14,7 @@ class DatabaseSeeder extends Seeder
     {
         Model::unguard();
 
-        // $this->call('UserTableSeeder');
+        // $this->call(UserTableSeeder::class);
 
         Model::reguard();
     }