Merge pull request #99 from pan93412/main

Use 'Extension' under 'DependencyInjection' component

src/DependencyInjection/MjmlExtension.php

@@ -7,8 +7,8 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 class MjmlExtension extends Extension
 {