allow docker_compose_files to be a list #139

	---
	name: Test Python package
	on: [pull_request, push]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
	pytest-version: [4, 5, 6, 7, 8]

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies, pytest ${{ matrix.pytest-version }}
	run: \|
	python -m pip install --upgrade pip setuptools
	pip install pytest==${{ matrix.pytest-version }}
	pip install ".[tests]"
	- name: Build image
	run: \|
	docker-compose -f tests/docker-compose.yml pull
	docker-compose -f tests/docker-compose.yml build
	- name: Run tests
	run: \|
	pytest -c setup.cfg
	- name: Stop Docker compose
	run: \|
	docker-compose -f tests/docker-compose.yml down

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