Adjust Django versions to >= 1.11, < 2.2.99.

zbohm · zbohm · commit 4931027d901e · 2019-08-08T14:14:54.000+02:00
diff --git a/setup.py b/setup.py
@@ -50,7 +50,7 @@
             "sphinx-me >= 0.1.2",
             "unidecode",
             "django-email-extras >= 0.2",
-            "django >= 1.8, < 2.2",
+            "django >= 1.11, < 2.2.99",
             "future <= 0.15.0",
         ],
         classifiers = [
