switch to packaging.version #52

	name: CI tests

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	lint:
	runs-on: ubuntu-20.04
	steps:
	- name: Repository checkout
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.6"

	- name: Install dependencies
	run: \|
	pip install --upgrade pip tox

	- name: Lint
	run: \|
	tox -e lint

	test:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python-version:
	- "3.6"
	- "3.7"
	- "3.8"
	- "3.9"
	- "3.10"
	steps:
	- name: Repository checkout
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	pip install --upgrade pip tox codecov

	- name: Test
	run: \|
	tox -e py3
	codecov

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