dj 3.0 (#7070)

Author: auvipy

tox.ini

@@ -28,7 +28,7 @@ deps =
         django20: Django>=2.0,<2.1
         django21: Django>=2.1,<2.2
         django22: Django>=2.2,<3.0
-        django30: Django==3.0rc1
+        django30: Django>=3.0,<3.1
         djangomaster: https://github.com/django/django/archive/master.tar.gz
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt