Update container image in GitHub workflow #40

	name: unittests py27

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-20.04
	container:
	image: python:2.7.18-buster

	steps:
	- uses: actions/checkout@v4
	with:
	submodules: recursive

	- name: Set up Python 2.7
	uses: actions/setup-python@v5
	with:
	python-version: 2.7

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip setuptools wheel
	pip install coverage[toml] tox

	- name: Test
	if: always()
	run: tox -e py27

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