Add multiple threads capability #131

	name: Run tests

	on:
	- push
	- pull_request

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: true
	matrix:
	python-version: ["3.9", "3.10", "3.11"]
	steps:
	- name: Checkout source
	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
	run: \|
	pip install -U pytest pytest-cov pyyaml posttroll
	- name: Run tests
	run: \|
	pytest --cov=pytroll_runner pytroll_runner/tests --cov-report=xml
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1
	with:
	file: ./coverage.xml
	env_vars: PYTHON_VERSION

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