Update CONTRIBUTING.md #15

	name: run-test-suite
	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-22.04
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10"]
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3
	with:
	fetch-depth: 0
	- name: Setup Python
	uses: actions/[email protected]
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: python -m pip install tox
	- name: Run tests
	run: python -m tox -e py -e lint

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