migrate @asyncio.coroutine to async/await #8

	name: Python package

	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", "3.12"]

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install .
	- name: Lint with flake8
	run: \|
	pip install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --show-source --statistics
	# exit-zero treats all errors as warnings.
	flake8 . --count --exit-zero --max-complexity=20 --max-line-length=80 --statistics
	- name: Test with pytest
	run: \|
	pip install pytest
	py.test -v --doctest-modules iostat tests

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