Add threat model. #53

	name: "CI"
	on:
	pull_request:
	push:
	jobs:
	check:
	name: Code check & unittests
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
	steps:
	- uses: actions/checkout@v4
	- name: Install poetry
	run: pipx install poetry
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: 'poetry' # caching poetry dependencies
	- name: Install dependencies
	run: poetry install
	- name: Check formatter
	run: poetry run ruff check . --no-fix
	- name: Check linter
	run: poetry run ruff format . --check
	- name: Check types
	run: poetry run mypy . --strict
	- name: Run unittests
	run: poetry run python -m pytest

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