Add djangomain tests to GitHub Action matrix

.github/workflows/tests.yml

@@ -18,13 +18,17 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
-        django-version: ["3.1", "3.2", "4.0"]
+        django-version: ["3.1", "3.2", "4.0", "main"]
         # If we want to exclude combinations, we add them here:
         exclude:
           - python-version: "3.6"
             django-version: "4.0"
+          - python-version: "3.6"
+            django-version: "main"
           - python-version: "3.7"
             django-version: "4.0"
+          - python-version: "3.7"
+            django-version: "main"
           - python-version: "3.10"
             django-version: "3.1"
     steps:

tox.ini

@@ -6,9 +6,9 @@ minversion = 1.8
 envlist =
     py36-django{32}
     py37-django{32}
-    py38-django{32,40,tip}
-    py39-django{32,40,tip}
-    py310-django{32,40,tip}
+    py38-django{32,40,main}
+    py39-django{32,40,main}
+    py310-django{32,40,main}
     flake8
 
 [gh-actions]
@@ -25,6 +25,7 @@ python =
 DJANGO =
     3.2: django32
     4.0: django40
+    main: djangomain
 
 ; Dependencies and ENV things we need for all environments:
 [base]
@@ -38,7 +39,7 @@ setenv =
 deps =
     django32: Django >= 3.2, < 3.3
     django40: Django >= 4.0, < 4.1
-    djangotip: https://github.com/django/django/archive/master.tar.gz
+    djangomain: https://github.com/django/django/archive/master.tar.gz
 extras =
     {[base]extras}
 setenv =