Fix call to Kernel

Author: Cethy

src/DependencyInjection/Configuration.php

@@ -4,7 +4,7 @@
 
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
-use App\Kernel;
+use Symfony\Component\HttpKernel\Kernel;
 
 /**
  * This is the class that validates and merges configuration from your app/config files.