Continuous Integration: Upgrade checkout and setup-python actions #397

	name: push-github-action
	on: [push, pull_request]
	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	# All available versions of Python:
	# https://github.com/actions/python-versions/blob/main/versions-manifest.json
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13.0-alpha.5"]
	fail-fast: false
	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: poetry

	- name: Display Python version
	run: python -c "import sys; print(sys.version)"

	- name: Display pip version
	run: python -m pip --version

	- name: Install pipx
	run: python -m pip install pipx

	- name: Install Poetry
	run: python -m pipx install "poetry>=1.4.0,<1.5.0"

	- name: Display Poetry version
	run: poetry --version

	- name: Install dependencies with Poetry
	run: poetry install

	- name: Lint
	run: poetry run make lint

	- name: Run tests
	run: poetry run python -m unittest

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