focus on currently supported releases of python and django

Author: Nikolaus Schlemm

tox.ini

@@ -4,22 +4,18 @@ usedevelop = True
 minversion = 1.8
 envlist =
     flake8
-    py{35,36}-dj111
-    py{35,36,37}-dj21
-    py{35,36,37,38,39}-dj22
-    py{36,37,38,39}-dj{30,31}
+    py3{6,7,8,9}-dj22
+    py3{6,7,8,9}-dj32
 
 [gh-actions]
 python =
-    3.5: py36
     3.6: py36
     3.7: py37
     3.8: py38, flake8
     3.9: py39
 
 [testenv]
 basepython =
-    py35: python3.5
     py36: python3.6
     py37: python3.7
     py38: python3.8
@@ -29,12 +25,7 @@ setenv =
     DJANGO_SETTINGS_MODULE = dbtemplates.test_settings
 deps =
     -r requirements/tests.txt
-    dj111: Django<2.0
-    dj20: Django<2.1
-    dj21: Django<2.2
     dj22: Django<2.3
-    dj30: Django<3.1
-    dj31: Django<3.2
     dj32: Django<3.3
     djmain: https://github.com/django/django/archive/main.tar.gz#egg=django
 
@@ -45,7 +36,7 @@ commands =
     coverage xml
 
 [testenv:flake8]
-basepython = python3.8
+basepython = python3.9
 commands = flake8 dbtemplates
 deps = flake8