[TASK] Update Pytest versions #454

	name: Unit Tests

	on: [push]

	jobs:
	tests:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python:
	# These have to be strings, as, e.g., 3.10 and 3.1 are NOT the same.
	- "3.9"
	steps:
	- uses: actions/checkout@v1
	- name: Setup Python
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python }}
	- name: Install gretel-synthetics
	run: pip install -e .[all,test] --use-deprecated=legacy-resolver
	- name: Lint
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 --count --select=E9,F63,F7,F82 --show-source --statistics src/
	# exit-zero treats all errors as warnings.
	flake8 --count --exit-zero --max-complexity=30 --max-line-length=120 --statistics src/
	- name: Test
	run: pytest -s -vv --cov src --cov-report term-missing tests/

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