Fix for Reverse Manager update_or_create calls

This attr list appears to be missing `update_or_create` which means that reverse related managers throw an error when trying to use them like `self.<MANAGER>.update_or_create()`.

Author: jpulec

pylint_django/augmentations/__init__.py

@@ -44,6 +44,7 @@
     'extra',
     'get',
     'get_or_create',
+    'update_or_create',
     'get_queryset',
     'create',
     'bulk_create',