fixed deprecations in SecurityServiceProvider tests

tests/Silex/Tests/Provider/SecurityServiceProviderTest/TokenAuthenticator.php

@@ -13,6 +13,7 @@ namespace Silex\Tests\Provider\SecurityServiceProviderTest;
 
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Kernel;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Security\Core\User\UserProviderInterface;
 use Symfony\Component\Security\Guard\AbstractGuardAuthenticator;
@@ -27,7 +28,7 @@ class TokenAuthenticator extends AbstractGuardAuthenticator
     public function getCredentials(Request $request)
     {
         if (!$token = $request->headers->get('X-AUTH-TOKEN')) {
-            return;
+            return Kernel::VERSION_ID < 34000 ? null : false;
         }
 
         list($username, $secret) = explode(':', $token);
@@ -38,6 +39,11 @@ class TokenAuthenticator extends AbstractGuardAuthenticator
         ];
     }
 
+    public function supports(Request $request)
+    {
+        return !empty($request->headers->get('X-AUTH-TOKEN'));
+    }
+
     public function getUser($credentials, UserProviderInterface $userProvider)
     {
         return $userProvider->loadUserByUsername($credentials['username']);