Add "sphinx-rtd-theme" package dependency for RTD generation #42

	#
	# This software may be modified and distributed under the terms
	# of the MIT license. See the LICENSE file for details.

	name: CI Tests

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	test:
	name: Python ${{ matrix.python }}
	runs-on: ubuntu-22.04
	strategy:
	matrix:
	python: ['3.8', '3.9', '3.10', '3.11', '3.12']
	fail-fast: false

	steps:
	- uses: actions/checkout@v4

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}

	- name: Update Pip
	run: pip install --upgrade pip setuptools

	- name: Install Tox
	run: pip install tox

	- name: Run tests
	run: tox -e py

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