Fix drop old python version, django and add new django version

Author: heavenshell

tox.ini

@@ -1,38 +1,38 @@
 [tox]
 envlist =
-  py{36,37,38}-dj22,
-  py{36,37,38}-dj30,
-  py{36,37,38}-dj31,
-  py{36,37,38}-djdev,
+  py{37,38}-dj32,
+  py{37,38}-dj40,
+  py{37,38}-dj41,
+  py{37,38}-djdev,
   flake8,
   isort,
   readme
   check-manifest
 
 [travis:env]
 DJANGO =
-  2.2: dj22
-  3.0: dj30
-  3.1: dj31
+  3.2: dj32
+  4.0: dj40
+  4.1: dj41
   dev: djdev
 
 [testenv]
 passenv = TOXENV CI TRAVIS TRAVIS_* CODECOV_*
 deps =
-  dj22: Django<2.3
-  dj30: Django<3.1
-  dj31: Django<3.2
+  dj32: Django<4.0
+  dj40: Django<4.1
+  dj41: Django<4.2
   django-pymemcache<2.0
   djdev: https://github.com/django/django/archive/master.tar.gz
   -r{toxinidir}/requirements.txt
-  py38-dj31: codecov
+  py38-dj32: codecov
 setenv =
   PYTHONPATH = {toxinidir}
 commands =
   coverage run --source=django_elastipymemcache -m nose --verbose
-  py38-dj31: coverage report
-  py38-dj31: coverage xml
-  py38-dj31: codecov
+  py38-dj32: coverage report
+  py38-dj32: coverage xml
+  py38-dj32: codecov
 
 [testenv:flake8]
 basepython = python3.8