use extension class from di component instead of the kernel

Author: dbu

CHANGELOG.md

@@ -4,6 +4,10 @@ The change log describes what is "Added", "Removed", "Changed" or "Fixed" betwee
 
 # Version 1
 
+# unreleased
+
+- Fixed extension to depend on the DependencyInjection component rather than the HttpKernel.
+
 # 1.33.0 - 2024-02-27
 
 - Support php-http/cache-plugin 2.0 and bump minimal version to 1.7 by defaulting the stream factory for cache to `httplug.psr17_stream_factory` (#448).

src/DependencyInjection/HttplugExtension.php

@@ -33,7 +33,7 @@
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\HttpKernel\Kernel;
 use Twig\Environment as TwigEnvironment;