Correcting definition of

Author: adamcharnock

graphene/contrib/django/types.py

@@ -50,7 +50,7 @@ def construct(cls, *args, **kwargs):
         return cls
 
 
-class DjangoFilterObjectTypeMeta():
+class DjangoFilterObjectTypeMeta(ObjectTypeMeta):
 
     def convert_django_field(cls, field):
         from graphene.contrib.django.filter import DjangoFilterConnectionField