ci: Refactor GitHub Actions workflow for PHP setup

- Updated PHP and PHPUnit versions in workflow matrix
- Added new extensions to PHP setup
- Enabled xdebug coverage
- Cached composer dependencies based on PHP version
- Removed Node setup and installation of dependencies
- Updated checkout action to version 4
- Set GITHUB_TOKEN environment variable for PHP setup
- Changed cache key for composer dependencies based on PHP version

.github/workflows/phpunit.yml

@@ -9,6 +9,12 @@ jobs:
 
     name: PHPUnit test suite
 
+    strategy:
+      matrix:
+        operating-system: ['ubuntu-latest']
+        php-versions: ['8.2', '8.3']
+        phpunit-versions: ['latest']
+
     services:
       postgres:
         image: postgres:latest
@@ -21,20 +27,17 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
-      - name: Install Node and dependencies
-        uses: actions/setup-node@v3
-        with:
-          node-version: 18
-          cache: 'npm'
-      - run: npm ci
-
-      - name: Setup PHP with pecl extensions
+      - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
-          extensions: phpredis,imagick
+          php-version: ${{ matrix.php-versions }}
+          extensions: mbstring, intl, phpredis, imagick
+          coverage: xdebug
+          tools: phpunit:${{ matrix.phpunit-versions }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Copy .env
         run: php -r "file_exists('.env') || copy('.env.github', '.env');"
@@ -48,9 +51,9 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          key: ${{ runner.os }}-php-${{ matrix.php-version }}-composer-${{ hashFiles('**/composer.lock') }}
           restore-keys: |
-            ${{ runner.os }}-composer-
+            ${{ runner.os }}-php-${{ matrix.php-version }}-composer-
 
       - name: Install Composer Dependencies
         run: composer install --quiet --no-ansi --no-interaction --no-progress