Fix `tox -e build` by pinning Python version (#51) #120

	name: Package

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	release:
	types: [published]

	jobs:
	deploy:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install tox
	- name: Build package via tox
	run: tox -e build
	- name: Upload artifacts
	uses: actions/upload-artifact@v3.0.0
	with:
	name: dist-files
	path: dist/*

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