fix typo

Author: taylorotwell

app/Exceptions/Handler.php

@@ -18,7 +18,7 @@ class Handler extends ExceptionHandler
         \Illuminate\Auth\Access\AuthorizationException::class,
         \Symfony\Component\HttpKernel\Exception\HttpException::class,
         \Illuminate\Database\Eloquent\ModelNotFoundException::class,
-        \Illuminate\Session\TokenMismatchException,
+        \Illuminate\Session\TokenMismatchException::class,
         \Illuminate\Validation\ValidationException::class,
     ];