Add Python 3.12 to CI tests, add pip caching #76

	name: Test

	on:
	- push
	- pull_request

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version:
	- "3.7"
	- "3.8"
	- "3.9"
	- "3.10"
	- "3.11"
	- "3.12"

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: "pip"
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8 pytest
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Test with pytest
	run: \|
	pytest tests.py

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