Add more type annotations #5

	name: CI

	on:
	# run on every push to main
	push:
	branches:
	- main
	# run on every push (not commit) to a PR, plus open/reopen
	pull_request:
	types:
	- synchronize
	- opened
	- reopened

	jobs:
	linux-test:
	name: ${{ matrix.os }} / test / Python ${{ matrix.python-version }}
	runs-on: ${{ matrix.os }}

	strategy:
	# continue testing other configurations even if a matrix job fails
	fail-fast: false
	matrix:
	os: ["ubuntu-latest"]
	python-version: ["3.11", "3.10", "3.9"]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install system dependencies
	run: sudo apt install libgeos-dev

	- name: Install Python dependencies
	run: pip install -e .

	- name: Install Python testing dependencies
	run: pip install mypy pytest

	- name: Run tests
	if: always()
	run: pytest .

	mac-test:
	name: ${{ matrix.os }} / test / Python ${{ matrix.python-version }}
	runs-on: ${{ matrix.os }}

	strategy:
	# continue testing other configurations even if a matrix job fails
	fail-fast: false
	matrix:
	os: ["macos-latest"]
	python-version: ["3.11"]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install system dependencies
	run: brew install geos

	- name: Install Python dependencies
	run: pip install -e .

	- name: Install Python testing dependencies
	run: pip install mypy pytest

	- name: Run tests
	if: always()
	run: pytest .

Provide feedback