CI: Add python 3.13.0-rc.3 (currently a pre-release). #19

	# -- TEST-VARIANT: pypy-27 on ubuntu-latest
	# BASED ON: test.yml
	# DESCRIPTION: Checks for Python 2.7 support and any problems

	name: test-pypy27
	on:
	workflow_dispatch:
	push:
	branches: [ "main", "release/**" ]
	pull_request:
	types: [opened, reopened, review_requested]
	branches: [ "main" ]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ["pypy-2.7"]
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: 'pip'
	cache-dependency-path: 'py.requirements/*.txt'

	- name: Install Python package dependencies
	run: \|
	python -m pip install -U pip setuptools wheel
	pip install --upgrade -r py.requirements/ci.github.testing.txt
	pip install -e .
	- name: Run tests
	run: pytest
	- name: Upload test reports
	uses: actions/upload-artifact@v4
	with:
	name: test reports
	path: \|
	build/testing/report.xml
	build/testing/report.html
	if: ${{ job.status == 'failure' }}
	# MAYBE: if: ${{ always() }}

Provide feedback