Add Django 3.0 support

Drop Django 2.0 and 2.1 support

Author: codingjoe

.travis.yml

@@ -3,14 +3,13 @@ dist: xenial
 python:
  - "3.6"
  - "3.7"
+ - "3.8"
 env:
- - DJANGO=20-sqlite
- - DJANGO=21-sqlite
  - DJANGO=22-sqlite
+ - DJANGO=30-sqlite
  - DJANGO=master-sqlite
- - DJANGO=20-pg
- - DJANGO=21-pg
  - DJANGO=22-pg
+ - DJANGO=30-pg
  - DJANGO=master-pg
 
 addons:

setup.cfg

@@ -57,17 +57,16 @@ addopts = --cov=mailauth --cov-report xml --cov-report term-missing --tb=short
 DJANGO_SETTINGS_MODULE = tests.testapp.settings
 
 [tox:tox]
-envlist = py{36,37}-dj{22,11,master}-{sqlite,pg},docs
+envlist = py{36,37,38}-dj{22,30,master}-{sqlite,pg},docs
 depencies = psycopg2-binary
 
 [testenv]
 passenv=CI
 setenv =
  pg: DB=pg
 deps =
- dj20: https://github.com/django/django/archive/stable/2.0.x.tar.gz#egg=django
- dj21: https://github.com/django/django/archive/stable/2.1.x.tar.gz#egg=django
- dj22: https://github.com/django/django/archive/stable/2.2.x.tar.gz#egg=django
+ dj22: django~=2.2
+ dj30: django~=3.0
  djmaster: https://github.com/django/django/archive/master.tar.gz#egg=django
  pg: psycopg2-binary
 commands = python setup.py test