GitHub Actions: Add Python 3.13 to the testing (#488)

* GitHub Actions: Add Python 3.13 to the testing

* Update tox.ini

* python -m pipx install "codespell[toml]" ruff

* pipx install "codespell[toml]" ruff

.github/workflows/tox.yml

@@ -9,23 +9,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Install Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: 3.x
-      - run: |
-          python -m pip install --upgrade pip
-          pip install --user "codespell[toml]==2.2.6" ruff
+      - run: pipx install "codespell[toml]" ruff
       - run: codespell
       - run: ruff check --output-format=github
 
   tox:
     needs: ruff
     strategy:
       fail-fast: false
-      max-parallel: 6
+      max-parallel: 5
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,py311,py312,pypy3
+envlist = py39,py310,py311,py312,py313,pypy3
 
 [base]
 deps =