text: Title: Update GraphiQL
  Body: as per 
  https://github.com/graphql-python/graphene-django/releases/tag/v2.12.0
  https://github.com/graphql-python/graphene-django/releases/tag/v2.12.1
  https://github.com/graphql-python/graphene-django/releases/tag/v2.13.0
  
  This should also simplify the subscriptions logic a bit