fix: fix kernel alias for request (#365)

- application container register request as string not class-string

src/System/Integrate/Http/Karnel.php

@@ -55,7 +55,7 @@ public function __construct(Application $app)
      */
     public function handle(Request $request)
     {
-        $this->app->set(Request::class, $request);
+        $this->app->set('request', $request);
 
         try {
             $this->bootstrap();