Fix malformed version on aniso8601 requirement (#995)
Fix malformed version on aniso8601 requirement (#995)

* Fix malformed version on aniso8601 requirement

* 6 -> 6.0

Co-Authored-By: Jonathan Kim <591eab53a5819753d19c836ac5a5cd7c69884984@gmail.com>

graphql-python/graphene,graphql-python/graphene