Add test runner for Python 3.12 #42

	# Checks performed on all pull requests, to any branch. Thus, required for protected branches,
	# but enables a workflow for CI validation against non-protected branches as well.

	name: PR checker

	on: pull_request

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.12
	uses: actions/setup-python@v3
	with:
	python-version: '3.12'
	- name: Install linters
	run: \|
	python -m pip install --upgrade pip
	pip install .[test] pre-commit
	pre-commit install
	- name: Run code quality checks
	run: \|
	pre-commit run --all
	test:
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]
	py: ['3.12', '3.11']
	# TODO: git
	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: ${{ matrix.py }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install .[test]
	- name: Run unit tests
	run: \|
	mkdir -p sandbox
	cd sandbox
	gsb test -vv --ignore-glob="docs/**" --log-level=DEBUG

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