Copy some VCF writer tests from sgkit #2

	name: CI

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	test:
	name: Test
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	# Use macos-13 because pip binary packages for ARM aren't
	# available for many dependencies
	os: [macos-13, macos-14, ubuntu-latest]
	python-version: ["3.9", "3.10", "3.11"]
	exclude:
	# Just run macos tests on one Python version
	- os: macos-13
	python-version: "3.10"
	- os: macos-13
	python-version: "3.11"
	- os: macos-14
	python-version: "3.9"
	- os: macos-14
	python-version: "3.10"
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install '.[dev]'
	- name: Run tests
	run: \|
	pytest

	packaging:
	name: Packaging
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install build twine validate-pyproject[all]
	- name: Check and install package
	run: \|
	validate-pyproject pyproject.toml
	python -m build
	python -m twine check --strict dist/*
	python -m pip install dist/*.whl
	- name: Check vcztools CLI
	run: \|
	vcztools --help
	python -m vcztools --help

Provide feedback