text: Title: Graphene Django is incompatible with django-filters 2.0.0
  Body: When using graphene-django along with `django-filter` 2.0.0 I get an error trying to use the graphql endpoint.
  
  A brief example:
  
  ```
  class Query(object):
      projects = DjangoFilterConnectionField(
          MyProjectNode, filterset_class=MyProjectFilterSet)
  ```
  
  This is the error:
  ```
  `GrapheneMyProjectFilterSet.filter_for_reverse_field` has been removed. `GrapheneMyProjectFilterSet.filter_for_field` now generates filters for reverse fields. See: https://django-filter.readthedocs.io/en/master/guide/migration.html
  ```