stop using deprecated `distutils.dep_util` #13

	# adapted from https://packaging.python.org/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/

	name: Publish Python distributions to PyPI

	on:
	push:
	branches:
	- 'long_lived/**'
	- main
	- 'release/**'
	tags:
	- '**'
	pull_request:
	branches:
	- '**'

	permissions:
	contents: read
	id-token: write

	jobs:
	build-n-publish:
	name: Build and publish Python distributions to PyPI
	runs-on: ubuntu-20.04

	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- run: \|
	git fetch origin +refs/tags/:refs/tags/

	- name: Set up Python 3.8
	uses: actions/setup-python@v4
	with:
	python-version: 3.8

	- name: Install pep517
	run: >-
	python -m
	pip install
	pep517
	--user

	- name: Build a binary wheel and a source tarball
	run: >-
	python -m
	pep517.build
	--binary
	--out-dir dist/
	.

	- name: Publish distribution to PyPI
	if: startsWith(github.event.ref, 'refs/tags')
	uses: pypa/gh-action-pypi-publish@release/v1
	with:
	packages-dir: dist/
	skip-existing: true

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