fixed HttpKernel dependencies after #18688

Author: HeahDude

Tests/EventListener/ValidateRequestListenerTest.php

@@ -13,7 +13,6 @@
 
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException;
-use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\EventListener\ValidateRequestListener;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;

composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=5.3.9",
         "symfony/event-dispatcher": "~2.6,>=2.6.7",
-        "symfony/http-foundation": "~2.5,>=2.5.4",
+        "symfony/http-foundation": "~2.7,>=2.7.15",
         "symfony/debug": "~2.6,>=2.6.2",
         "psr/log": "~1.0"
     },