Removed Python 3.7 & 3.8 from tests, fixed PEP8 errors #233

	name: Test

	on:
	pull_request:
	types: [opened, synchronize, reopened, labeled, unlabeled]

	jobs:
	tests:
	strategy:
	matrix:
	python: ['3.9', '3.10']
	runs-on: ubuntu-latest
	env:
	CI: 1
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: recursive
	- name: Set up Python ${{ matrix.python }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python }}
	- name: Test
	run: \|
	pip install --upgrade --editable .
	pip install -r tests/requirements.txt
	python -m unittest discover -s tests

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