Support Python 3.11 formally.

Author: tim-schilling

.github/workflows/testing.yml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.7", "3.8", "3.9", "3.10" ]
+        python-version: [ "3.7", "3.8", "3.9", "3.10", "3.11" ]
         django-version: [ "3.2", "4.0", "4.1", "4.2a1"]
         drf-version: [ "3.11", "3.12", "3.13" ]
         exclude:
@@ -41,6 +41,11 @@ jobs:
             python-version: 3.7
           - django-version: 4.2a1
             python-version: 3.7
+          # Python 3.11 is incompatible with Django <v4.1
+          - django-version: 3.2
+            python-version: 3.11
+          - django-version: 4.0
+            python-version: 3.11
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4