test on all PHPs

.github/workflows/test.yml

@@ -26,12 +26,15 @@ jobs:
     services:
       mariadb:
         image: mariadb:10.6
+    strategy:
+      matrix:
+        php_version: [7.4, 8.1, 8.3] # Versions represent newest 7.x, WP supported with exclusions, and beta support.
     steps:
       - uses: actions/checkout@v4
-      - name: Setup PHP 8.3
+      - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.3
+          php-version: ${{ matrix.php_version }}
           extensions: mysqli, zip, imagick
       - name: Start MySQL
         run: sudo systemctl start mysql
@@ -42,7 +45,11 @@ jobs:
           key: test-phpunit-dependencies-${{ hashFiles('composer.json') }}
           restore-keys: test-phpunit-dependencies-${{ hashFiles('composer.json') }}
       - name: Install Composer dependencies
-        run: composer install
+        run: |
+          if [ ${{ matrix.php_version }} = "7.4" ]; then
+            composer update
+          fi
+          composer install
       - name: Install WP-CLI
         run: |
           curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar