Pull graphene-django from v2 branch

Author: jeremystretch

requirements.txt

@@ -15,7 +15,7 @@ djangorestframework==3.12.4
 drf-yasg[validation]==1.20.0
 #graphene_django==2.15.0
 # Installing from PR origin temporarily
-git+git://github.com/MisterGlass/graphene-django.git
+git+git://github.com/graphql-python/graphene-django.git@v2
 gunicorn==20.1.0
 Jinja2==3.0.3
 Markdown==3.3.6