Update tox to use Django 2.2 final. (encode#6556)

carltongibson · web-flow · commit b1122a441aea · 2019-04-01T16:30:26.000+02:00
diff --git a/tox.ini b/tox.ini
@@ -25,7 +25,7 @@ deps =
         django111: Django>=1.11,<2.0
         django20: Django>=2.0,<2.1
         django21: Django>=2.1,<2.2
-        django22: Django>=2.2rc1,<3.0
+        django22: Django>=2.2,<3.0
         djangomaster: https://github.com/django/django/archive/master.tar.gz
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt
