Add GitHub Actions CI workflow #4

	name: CI

	on:
	push:
	branches:
	- master
	pull_request:

	env:
	PYTHON_VERSION: '3.7'

	jobs:
	run-tox:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ env.PYTHON_VERSION }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ env.PYTHON_VERSION }}
	cache: 'pip'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	- name: Run tox
	run: tox

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