[requirements] Move back to jsonfield #114
[requirements] Move back to jsonfield #114

Closes #114

netjson/django-netjsongraph,netjson/django-netjsongraph,netjson/django-netjsongraph,interop-dev/django-netjsongraph,netjson/django-netjsongraph,interop-dev/django-netjsongraph,interop-dev/django-netjsongraph