Modernize project configuration and source layout #361

	---
	name: CI

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.8, 3.9, '3.10', '3.11', '3.12', 'pypy-3.8', 'pypy-3.9']

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: 'pip'
	cache-dependency-path: 'tests/requirements.txt'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip setuptools
	python -m pip install -r tests/requirements.txt
	pip install -e .
	- name: Lint
	run: \|
	flake8
	black --check --diff .
	isort --check --diff .
	- name: Typing
	run: \|
	python -m mypy
	- name: Tests
	run: \|
	python -m pytest -v

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