Update supported python and django versions.

Removes Django 2.2-3.1 support.
Adds python 3.7 into the testing matrix.
Adds Django 4.1 and Python 3.10 into the testing matrix.

Author: tim-schilling

.github/workflows/testing.yml

@@ -30,19 +30,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.8.12", "3.9.13", "3.10.5" ]
-        django-version: [ "3.0", "3.1", "3.2", "4.0" ]
+        python-version: [ "3.7", "3.8", "3.9", "3.10" ]
+        django-version: [ "3.2", "4.0", "4.1"]
         drf-version: [ "3.11", "3.12", "3.13" ]
         exclude:
-          # Django v4 drops Python 3.6, and 3.7 support
+          # Python 3.7 is incompatible with Django v4+
           - django-version: 4.0
             python-version: 3.7
-          - django-version: 4.0
-            python-version: 3.6
-          # DRF 3.10 is incompatible with Django v4
+          - django-version: 4.1
+            python-version: 3.7
+          # DRF 3.10 is incompatible with Django v4+
           - django-version: 4.0
             drf-version: 3.10
-          - django-version: 4.0
+          - django-version: 4.1
             drf-version: 3.10
     steps:
       - uses: actions/checkout@v2