Merge branch '7.0' into 7.1

* 7.0:
  Update serializer.rst

components/serializer.rst

@@ -1708,7 +1708,7 @@ context option::
  }
  }
 
- $normalizer = new ObjectNormalizer($classMetadataFactory);
+ $normalizer = new ObjectNormalizer();
  $serializer = new Serializer([$normalizer]);
 
  $data = $serializer->denormalize(