fix: python 3.8 type hint #825

	name: "darwin tests for 'kiara'"
	# This workflow is triggered on pushes to the repository.
	on: [push]
	env:
	DEVELOPER_DIR: /Applications/Xcode_12.4.app/Contents/Developer
	MACOSX_DEPLOYMENT_TARGET: 10.15


	jobs:
	test-darwin:
	name: pytest on darwin
	runs-on: macos-11
	strategy:
	matrix:
	python_version: ["3.8", "3.9", "3.10", "3.11"]
	steps:
	- name: "Set up Python ${{ matrix.python_version }}"
	uses: actions/setup-python@v2
	with:
	python-version: "${{ matrix.python_version }}"
	- name: pip cache
	id: pip-cache
	uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('*/setup.') }}
	- uses: actions/checkout@v2
	- name: install core_types plugin
	run: pip install -U git+https://github.com/DHARPA-project/kiara_plugin.core_types@develop
	- name: install tabular types plugin
	run: pip install -U git+https://github.com/DHARPA-project/kiara_plugin.tabular@develop
	- name: install kiara
	run: pip install -U .[dev_testing]
	- name: display installed kiara and module package versions
	run: pip list \| grep kiara
	- name: test with pytest
	run: make test

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