Fix code scanning alerts by adding permissions decl. #23

	# Copyright 2020 Google

	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.


	name: Continuous Integration

	on: [pull_request]

	# Declare default permissions as read only.
	permissions: read-all

	jobs:
	pytest-matrix:
	name: Run Pytest on Python ${{matrix.python-version}}
	strategy:
	matrix:
	python-version: ['3.9', '3.10', '3.11', '3.12']
	runs-on: ubuntu-22.04
	steps:
	- name: Get a local copy of the source repository
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4

	- name: Set up Python ${{matrix.python-version}}
	uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5
	with:
	python-version: ${{matrix.python-version}}
	architecture: 'x64'

	- name: Install requirements
	run: pip install -r ./dev_tools/pip-list

	- name: Pytest check
	run: pytest

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