Update workflow to use GITHUB_OUTPUT #704

	on: push

	name: Tests

	jobs:
	runTests:
	name: Run unit tests
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.8
	uses: actions/setup-python@v2
	with:
	python-version: 3.8
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade 'pip<20.3'
	pip install -r covid19-etl-requirements.txt
	pip install -r test-requirements.txt
	pip install pytest~=3.6
	- name: Test with pytest
	run: \|
	pytest -vv covid19-etl/tests

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