Merge branch '3.2'

* 3.2:
  Permit empty suffix on Windows
  fixed CS
  [FrameworkBundle] Remove unused import
  [Console][Table] fixed render when using multiple rowspans.
  add docblocks for Twig url and path function to improve ide completion
  check for circular refs caused by method calls
  [Serializer] fix upper camel case conversion (see #21399)
  [DI] Auto register extension configuration classes as a resource
  [Console] Updated phpdoc on return types

Author: fabpot

DependencyInjection/FrameworkExtension.php

@@ -35,7 +35,6 @@
 use Symfony\Component\Serializer\Normalizer\JsonSerializableNormalizer;
 use Symfony\Component\Workflow;
 use Symfony\Component\Workflow\SupportStrategy\ClassInstanceSupportStrategy;
-use Symfony\Component\Yaml\Yaml;
 use Symfony\Component\Console\Application;
 
 /**