Update dependency graphene-django to v2.11.0

Author: renovate-bot

{{ cookiecutter.project_slug }}/server/requirements.txt

@@ -8,7 +8,7 @@ django-environ==0.4.5
 
 # GraphQL
 django-graphql-jwt==0.3.1
-graphene-django==2.9.0
+graphene-django==2.11.0
 
 # Technically graphene and graphql-core should not have to be specified here,
 # but running into a compatibility issue unless it is locked as pre 3.0