Improve types #165

	name: build

	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]

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

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -e ".[testing]"
	- name: Test with pytest
	run: \|
	# `-n auto` tells pytest-xdist to create 1 worker per CPU core. For
	# GitHub actions, this typically results in 2 workers.
	pytest -n auto

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