re-upgrade celery, kombu, and redis for Python 3.7 compatibility
re-upgrade celery, kombu, and redis for Python 3.7 compatibility

tetherless-world/graphene,tetherless-world/satoru,tetherless-world/graphene,tetherless-world/satoru,tetherless-world/satoru,tetherless-world/satoru,tetherless-world/graphene,tetherless-world/graphene