.github/workflows/matrixtest.yml: use LizardByte/setup-python-action #22

	name: Run lint and tests

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v4
	with:
	python-version: '3.12'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8
	pip install -e .[dev]
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 chatexchange --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 chatexchange --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Test
	run:
	python -m pytest

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