new: Three-way comparison support from C++20 #192

	name: Tests

	on:
	push:
	branches:
	- '**'
	pull_request:
	branches: [ main ]

	jobs:
	tests:
	strategy:
	fail-fast: false
	matrix:
	python-version: [3.8]
	os-environment: [ubuntu-20.04, windows-2019, macos-11]
	runs-on: ${{ matrix.os-environment }}
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -r requirements.txt
	- name: run tests
	run: \|
	python -m tox -e py
	build_doc:
	needs: tests
	strategy:
	fail-fast: true
	matrix:
	python-version: [3.8]
	os-environment: [ubuntu-20.04]
	runs-on: ${{ matrix.os-environment }}
	steps:
	- name: Full checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -r requirements.txt
	- name: Build package
	run: \|
	python -m build
	- name: Build documentation
	shell: bash
	run: \|
	python build_local.py
	rm -d -r docs
	python build_doc.py

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