Run CI builds in Ubuntu 18.04 container to use Python 2 #6

	# CI workflow running the unit tests.
	name: CI

	on: [ push, pull_request ]

	jobs:
	build:
	runs-on: ubuntu-latest
	# We need to use an OLS old enough to still have Python 2
	container: ubuntu:18.04

	steps:
	- name: Set up
	run: \|
	apt-get update -qq
	apt-get install -qq git make python2

	- name: Check out
	uses: actions/checkout@v3

	- name: Install dependencies
	run: \|
	pip install Sphinx
	pip install pytest
	pip install clint

	- name: Run tests
	run: make test

Provide feedback