Tweak python/django test matrix for github actions.

Author: davidt

.github/workflows/test.yml

@@ -12,10 +12,6 @@ jobs:
         python-version: ['3.7', '3.8', '3.9', '3.10', 'pypy-3.8']
         django-version: ['2.2', '3.0', '3.1', '3.2', '4.0', 'main']
         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'
@@ -28,6 +24,8 @@ jobs:
             django-version: '3.0'
           - python-version: '3.10'
             django-version: '3.1'
+          - python-version: '3.10'
+            django-version: '3.2'
 
     steps:
     - uses: actions/checkout@v3