Fix: Use PHP 7.4 (composer:2.0) for Laravel 7.x compatibility

- Changed from composer:2.2 (PHP 8.1) to composer:2.0 (PHP 7.4)
- Removed --ignore-platform-reqs flag as it's no longer needed
- PHP 7.4 is fully compatible with Laravel 7.x without deprecation warnings
- This fixes the 'artisan package:discover' error caused by PHP 8.1 strict typing

.drone.yml

@@ -5,9 +5,9 @@ name: default
 steps:
   # Step 1: Install dependencies and run tests
   - name: test
-    image: composer:2.2
+    image: composer:2.0
     commands:
-      - composer install --prefer-dist --no-progress --no-interaction --ignore-platform-reqs
+      - composer install --prefer-dist --no-progress --no-interaction
       - composer validate --strict
       - echo "✓ Composer validation passed"
       # Uncomment when tests are ready: