examples: add hello world #4

	name: CI

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: "3.8"

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install poetry
	poetry install

	- name: Run tests
	run: poetry run pytest

	- name: Run examples
	run: \|
	for script in examples/*.py; do
	poetry run python "$script"
	done

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