dropped django 2.0

Author: auvipy

tox.ini

@@ -1,11 +1,11 @@
 [tox]
 envlist =
     py27-django{111}
-    py35-django{111,20,21,22}
-    py36-django{111,20,21,22}
-    py37-django{111,20,21,22}
+    py35-django{111,21,22}
+    py36-django{111,21,22}
+    py37-django{111,21,22}
     pypy-django{111}
-    pypy3-django{111,20,21,22}
+    pypy3-django{111,21,22}
     flake8
     flakeplus
     apicheck
@@ -16,7 +16,7 @@ envlist =
 [travis:env]
 DJANGO =
     1.11: django111
-    2.0: django20
+    2.1: django21
     2.2: django22
 
 [testenv]
@@ -28,7 +28,6 @@ deps=
     cov: -r{toxinidir}/requirements/test-django111.txt
 
     django111: -r{toxinidir}/requirements/test-django111.txt
-    django20: -r{toxinidir}/requirements/test-django20.txt
     django21: django>=2.1<2.2
     django22: -r{toxinidir}/requirements/test-django22.txt
 
@@ -169,5 +168,5 @@ usedevelop = true
 commands =
     pip install -U https://github.com/celery/celery/zipball/master#egg=celery
     pip install -U https://github.com/celery/kombu/zipball/master#egg=kombu
-    pip install Django==2.0
+    pip install Django==2.2
     py.test -x --cov=django_celery_beat --cov-report=xml --no-cov-on-fail