Update tox requirement from ~=4.17.1 to ~=4.20.0 #363

	name: Build

	on:
	push:
	pull_request:
	schedule:
	- cron: "0 07 * * FRI"

	workflow_dispatch:
	inputs:
	ref:
	description: \|
	ref: the branch, tag or SHA to checkout.
	If empty, the ref is inferred from the event that triggered the workflow.
	required: false
	default: ''
	type: string

	jobs:
	build_wheels:
	name: Build for Python ${{ matrix.python }} on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os:
	- ubuntu-20.04
	- windows-2019
	- macos-11
	python:
	- '3.6'
	- '3.7'
	- '3.8'
	- '3.9'
	- '3.10'
	- '3.11'

	steps:
	- name: Checkout Repository
	uses: actions/checkout@v4
	with:
	ref: ${{ inputs.ref }}

	- name: Install Python ${{ matrix.python }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}

	- name: Install pip
	run: pip install --upgrade pip

	- name: Install Python packages
	run: pip install --upgrade build twine

	- name: Build wheels
	run: python -m build

	- name: Check PyPi description
	run: python -m twine check dist/*

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