GitHub Actions: Add Python 3.12 to the testing (#445)

* Django 5.0 supports Python 3.10, 3.11, and 3.12

https://pypi.org/project/Django

https://www.djangoproject.com/weblog/2023/dec/04/django-50-released

Django 4.1 has reached the end of extended support. The final security release ([4.1.13](https://docs.djangoproject.com/en/stable/releases/4.1.13/)) was issued on November 1st. All Django 4.1 users are encouraged to [upgrade](https://docs.djangoproject.com/en/dev/howto/upgrade-version/) to Django 4.2 or later.

https://docs.djangoproject.com/en/5.0/releases/5.0
> Django 5.0 supports Python 3.10, 3.11, and 3.12.

* tox.ini: Add py312

* python: ["3.8", "3.9", "3.10", "3.11", "3.12"]

.github/workflows/tox.yml

@@ -10,26 +10,26 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: 3.x
       - run: |
           python -m pip install --upgrade pip
           pip install --user "codespell[toml]" ruff
       - run: codespell
-      - run: ruff check --output-format=github .
+      - run: ruff check --output-format=github
 
   tox:
     needs: ruff
     strategy:
       fail-fast: false
       max-parallel: 6
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11"]
+        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
       - run: pip install --upgrade pip

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,py311,pypy3
+envlist = py38,py39,py310,py311,py312,pypy3
 
 [base]
 deps =