Drop Django 3.0, 3.1, 3.2. Drop Python 3.7.

.github/workflows/integration-test.yml

@@ -29,6 +29,7 @@ jobs:
 
   test:
     name: ${{ matrix.config.tox }} ${{ matrix.config.options }}
+    # Ubuntu 22.04 runner includes Python 3.10
     runs-on: ubuntu-22.04
     needs: skip_duplicate_runs
     if: needs.skip_duplicate_runs.outputs.should_skip != 'true'

.github/workflows/test.yml

@@ -30,6 +30,7 @@ jobs:
           python -m tox --gh-matrix-dump  # for debugging
 
   test:
+    # Ubuntu 22.04 runner includes Python 3.10
     runs-on: ubuntu-22.04
     needs: get-envlist
     strategy:
@@ -52,7 +53,7 @@ jobs:
         # for installing/running tox
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - name: Install tox
         run: |
           set -x