Few minor fixes and readme updates

Author: o-churkin

README.md

@@ -12,8 +12,8 @@ The main idea of this package: you don't need to touch any existing function cod
 
 Library was tested in the following environments:
 
-* Python 2.7, 3.5, 3.6
-* Django 1.8, 1.11, >=2.0.0
+* Python 3.7, 3.8, 3.9, 3.10
+* Django >=2.0.0
 
 Feel free to try it in yours, but it's not guaranteed it will work. Submit an issue if you think it should.
 

tests/benchmarks.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals, print_function
-
 import math
 from contextlib import contextmanager
 from timeit import default_timer
@@ -29,7 +27,7 @@
             'KEY_PREFIX': 'custom_prefix',
         },
         'memcached': {
-            'BACKEND': "django.core.cache.backends.memcached.PyMemcacheCache",
+            'BACKEND': 'django.core.cache.backends.memcached.PyMemcacheCache',
             'LOCATION': MEMCACHED_HOST,
             'KEY_PREFIX': 'memcached',
         },

tests/tests_basic.py

@@ -96,7 +96,6 @@ def is_pylibmc(self):
     @property
     def is_redis(self):
         try:
-            # noinspection PyUnresolvedReferences
             from django_redis.client import DefaultClient
         except ImportError:
             return False
@@ -410,15 +409,6 @@ def _check_base(self, method, param_to_change=None):
         a, b, c = items[:3]
 
         result = process_args(a, b, c)
-        # argspec = getargspec(method.function)
-        # start_arg_idx = 0
-        # if len(argspec.args) == 4:
-        #     start_arg_idx = 1
-        # params = {
-        #     argspec.args[start_arg_idx]: a,
-        #     argspec.args[start_arg_idx + 1]: b,
-        #     argspec.args[start_arg_idx + 2]: c,
-        # }
         self.assertEqual(method(a, b, c), result)
         self.cache.assert_called_once_with(result)
         self.cache.reset_mock()
@@ -966,7 +956,7 @@ def get_cache_instance(self):
 @override_settings(
     CACHES={
         'default': {
-            'BACKEND': "django.core.cache.backends.memcached.MemcachedCache",
+            'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
             'LOCATION': MEMCACHED_HOST,
             'KEY_PREFIX': 'memcached',
         }

tox.ini

@@ -1,7 +1,8 @@
 [tox]
 envlist =
     {py37}-django20
-    {py38,py39,py310}-django34
+    {py38,py39,py310}-{django34}
+    {py310}-{django4}
 tox_pyenv_fallback=False
 
 [pytest]
@@ -23,6 +24,8 @@ deps =
     django20: python-memcached
     django34: Django>=3
     django34: pymemcache
+    django4: Django>=4
+    django4: pymemcache
     pytest
     django-redis
     memory-profiler