Revert "I think we can remove the method "through()" from here" (dingo#1501)

Author: thilanga

src/Http/Middleware/Request.php

@@ -122,7 +122,7 @@ protected function sendRequestThroughRouter(HttpRequest $request)
     {
         $this->app->instance('request', $request);
 
-        return (new Pipeline($this->app))->send($request)->then(function ($request) {
+        return (new Pipeline($this->app))->send($request)->through($this->middleware)->then(function ($request) {
             return $this->router->dispatch($request);
         });
     }