Use shutdown callback instead of after

Author: jenssegers

src/RollbarServiceProvider.php

@@ -83,7 +83,7 @@ protected function registerListeners()
         });
 
         // Register after filter
-        $this->app->after(function()
+        $this->app->shutdown(function()
         {
             $rollbar = App::make('rollbar');
             $rollbar->flush();

tests/RollbarTest.php

@@ -93,7 +93,7 @@ public function testFlush()
         $this->app->instance('rollbar', $mock);
 
         Route::enableFilters();
-        Event::fire('router.after');
+        $this->app->shutdown();
     }
 
     public function testQueueGetsPushed()