Use `terminus-github-actions` and Sage install script cleanup #589

	name: Lint and Test

	on:
	pull_request:
	types:
	- opened
	- reopened
	- synchronize
	- ready_for_review

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	php-version: ['8.0', '8.1', '8.2', '8.3']

	steps:
	- uses: actions/checkout@v4

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-version }}

	- name: Cache Composer dependencies
	id: composer-cache
	run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT

	- uses: actions/cache@v4
	with:
	path: ${{ steps.composer-cache.outputs.dir }}
	key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
	restore-keys: ${{ runner.os }}-composer-

	- name: Check Composer lock file is up to date
	run: composer validate --no-check-all

	- name: Install Composer dependencies
	run: composer update --no-progress --prefer-dist --optimize-autoloader

	- name: Run lints
	run: composer lint

	- name: Run tests
	run: composer test

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