Update Azure to Ubuntu 22.04 #269

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Python application

	# Trigger the workflow on push or pull request
	on: [push, pull_request]

	# A workflow run is made up of one or more jobs that can run sequentially or in
	# parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ${{ matrix.os }}

	strategy:
	fail-fast: false
	matrix:
	include:
	- os: ubuntu-20.04

	# Steps represent a sequence of tasks that will be executed as part of the
	# job
	steps:
	- name: Build environment information
	run: 'echo "Matrix OS: ${{ matrix.os }} on $HOSTNAME with $(getconf _NPROCESSORS_ONLN) cores"'

	- uses: actions/checkout@v2

	- name: Set up Python 3.6
	uses: actions/setup-python@v2
	with:
	python-version: 3.6

	- name: Set up Python 3.7
	uses: actions/setup-python@v2
	with:
	python-version: 3.7

	- name: Set up Python 3.8
	uses: actions/setup-python@v2
	with:
	python-version: 3.8

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

	- name: Restore tox environment
	id: restore-tox
	uses: actions/cache@v2
	with:
	path: \|
	.tox
	key: tox-env-${{ hashFiles('tox.ini', 'requirements.txt') }}

	- name: Run tox
	run: \|
	tox

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