Core: Improve assembling retention task list #119

	---
	name: Tests

	on:
	pull_request: ~
	push:
	branches: [ main ]

	jobs:

	tests:

	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: ["ubuntu-latest"]
	python-version: ["3.11"]

	env:
	OS: ${{ matrix.os }}
	PYTHON: ${{ matrix.python-version }}

	name: Python ${{ matrix.python-version }} on OS ${{ matrix.os }}
	steps:

	- name: Acquire sources
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	architecture: x64
	cache: 'pip'
	cache-dependency-path: 'pyproject.toml'

	- name: Setup project
	run: \|

	# `setuptools 0.64.0` adds support for editable install hooks (PEP 660).
	# https://github.com/pypa/setuptools/blob/main/CHANGES.rst#v6400
	pip install "setuptools>=64" --upgrade

	# Install package in editable mode.
	pip install --use-pep517 --prefer-binary --editable=.[test,develop]

	- name: Run linter and software tests
	run: \|
	poe check

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