Change return types #277

	name: test and lint
	on:
	push:
	branches:
	- main
	pull_request:
	workflow_dispatch:
	workflow_call:
	jobs:
	lint:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v3
	- name: Install poetry
	run: pipx install poetry
	- uses: actions/setup-python@v4
	with:
	python-version: "3.10"
	cache: "poetry"
	- name: Install dependencies
	run: poetry install --with dev
	- name: check ruff
	run: poetry run ruff check $(git ls-files '*.py')
	- name: lint code
	run: poetry run pylint $(git ls-files '*.py') --fail-under 7.0 --verbose
	- name: check docstyle (Google styledoc)
	run: poetry run pydocstyle $(git ls-files '*.py') --verbose --convention=google
	- name: check changelog
	run: poetry run changelogmanager --error-format github validate
	- name: run mypy
	run: poetry run mypy $(git ls-files '*.py')
	- name: check black formatting
	run: poetry run black --check --verbose $(git ls-files '*.py')
	- name: check sorted order
	run: poetry run isort $(git ls-files '*.py') --check-only
	test:
	timeout-minutes: 5
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
	steps:
	- uses: actions/checkout@v3
	- name: Install poetry
	run: pipx install poetry
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	cache: "poetry"
	- name: Install dependencies
	run: poetry install --with dev,github-actions
	- name: Run tests
	run: poetry run pytest --cov --cov-fail-under 90 --cov-report term-missing

Provide feedback