* gql/graphene-django/graphene_django/tests/test_converter.py:175:
RemovedInDjango40Warning: django.utils.translation.ugettext_lazy() is
deprecated in favor of django.utils.translation.gettext_lazy().
* graphene-django/graphene_django/utils/utils.py:28:
RemovedInDjango40Warning: force_text() is deprecated in favor of
force_str().
* Add headers arg to GraphQLTestCase.query
* fix headers NoneType case in GraphQLTestCase.query
* Run format
Co-authored-by: Jonathan Kim <jkimbo@gmail.com>