Upgrade to actions/checkout v4 #9

	# Copyright 2021 Google LLC
	#
	# 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: "Build & test"

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]
	schedule:
	# https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule
	#
	# ┌───────────── minute (0 - 59)
	# │ ┌───────────── hour (0 - 23)
	# │ │ ┌───────────── day of the month (1 - 31)
	# │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
	# │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
	# │ │ │ │ │
	- cron: '1 2 3 * *' # run at 2:01 every month on the 3rd day

	jobs:
	run-tests:
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ 'ubuntu-24.04', 'ubuntu-22.04', 'macos-14', 'macos-13', 'macos-12' ]
	name: ${{ matrix.os }}
	steps:
	- name: Checkout repo
	uses: actions/checkout@v4

	- name: Run tests
	run: make test VERBOSE=1

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