Upgrade project to latest versions of python and django

Author: Alexerson

imagekit/conf.py

@@ -36,5 +36,8 @@ def configure_cache_timeout(self, value):
 
     def configure_default_file_storage(self, value):
         if value is None:
-            value = settings.DEFAULT_FILE_STORAGE
+            try:
+                value = settings.STORAGES["default"]["BACKEND"]
+            except AttributeError:
+                value = settings.DEFAULT_FILE_STORAGE
         return value

tox.ini

@@ -1,23 +1,23 @@
 [tox]
 envlist =
-    py{36,37,38,39,310}-django{22,31,32},
+    py{37,38,39,310,311}-django{32,41,42},
     py310-djangomain,
     coverage-report
 
 [gh-actions]
 python =
-    3.6: py36
     3.7: py37
     3.8: py38
     3.9: py39
-    3.10: py310, coverage-report
+    3.10: py310
+    3.11: py311, coverage-report
 
 [testenv]
 deps =
     -r test-requirements.txt
-    django22: django~=2.2.0
-    django31: django~=3.1.0
     django32: django~=3.2.0
+    django41: django~=4.1.0
+    django42: django~=4.2.0
     djangomain: https://github.com/django/django/archive/refs/heads/main.zip
 
 setenv = COVERAGE_FILE=.coverage.{envname}