Add type annotations to part of the public API #414

	name: pr
	on: pull_request
	jobs:
	tests:
	name: python-${{ matrix.python-version }}-${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	python-version: ["3.9", "3.10", "3.11"]
	os: ["macOS-latest", "ubuntu-latest", "windows-latest"]
	steps:
	- uses: actions/checkout@v2
	- name: setup-python-${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: install-requirements
	run: \|
	python -m pip install --upgrade pip tox tox-gh-actions
	python -m pip install -e .
	- name: run-tests
	run: tox
	lint:
	name: lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: setup-python-3.11
	uses: actions/setup-python@v2
	with:
	python-version: 3.11
	- name: install-requirements
	run: \|
	python -m pip install --upgrade pip tox tox-gh-actions
	python -m pip install -e .
	- name: lint
	run: tox -e lint
	docs:
	name: docs
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: setup-python-3.11
	uses: actions/setup-python@v2
	with:
	python-version: 3.11
	- name: install-requirements
	run: \|
	python -m pip install --upgrade pip tox tox-gh-actions
	python -m pip install -e .
	- name: docs
	run: tox -e docs
	- uses: actions/upload-artifact@v3
	with:
	name: html_docs
	path: build/html

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