Improve public API type annotations & fix unit test type errors #963

	name: CI

	on: [push, pull_request]

	jobs:

	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	cache: 'pip'
	cache-dependency-path: 'requirements/*.txt'
	- name: Install dev dependencies
	run: python -m pip install -r requirements/dev.txt
	- name: Run linting
	run: python -m tox -e lint,mypy,mypy-samples-image,mypy-samples-json

	test:
	strategy:
	matrix:
	python: ['3.9', '3.10', '3.11', '3.12', '3.13']
	os: [ubuntu-latest, windows-latest, macos-latest]
	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}
	cache: 'pip'
	cache-dependency-path: 'requirements/*.txt'
	- name: Install dev dependencies
	run: python -m pip install -r requirements/dev.txt
	- name: Run tests
	run: python -m tox -e py # Run tox using the version of Python in `PATH`

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