Add typing and checking it via mypy #40

	name: Python
	on: push
	jobs:
	check:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [ '3.9', '3.10', '3.11', '3.12' ]
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: pip install --requirement requirements.txt
	- name: Check lint and test
	run: make check
	- name: Check publish
	run: make publish

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