Change minimum Python version to 3.9 #142

	name: Tests

	on: [push]

	jobs:
	Test:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true
	token: ${{ secrets.GIT_TOKEN }}
	- name: Set up Python 3.10
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"
	- name: Install Poetry
	uses: abatilo/actions-poetry@v2.1.6
	with:
	poetry-version: "1.3.2"
	- name: Install dependencies
	run: poetry install
	- name: Run tests
	run: poetry run invoke test
	- name: Run style checker
	run: poetry run flake8

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