Replaced internal HttpKernel Extension usage in IbexaHttpCacheExtension (#71)

Author: tbialcz

src/bundle/DependencyInjection/IbexaHttpCacheExtension.php

@@ -12,9 +12,9 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
 use Symfony\Component\DependencyInjection\Loader;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\Yaml\Yaml;
 
 class IbexaHttpCacheExtension extends Extension implements PrependExtensionInterface