Use only Python 3 in CI #35

	name: build
	on: [push, pull_request]
	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.8, 3.8, 3.10, 3.11]
	steps:
	- 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 flake8
	- name: Lint
	run: \|
	flake8 contribute.py
	flake8 test_contribute.py
	- name: Test for commits
	run: \|
	python -m unittest test_contribute

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