Add PHPStan configuration for Symfony4 tests

- Created a new phpstan.neon file in the Symfony4 tests directory.
- Configured paths and excluded Symfony3 directory.
- Added bootstrap files for autoloading.
- Set dynamic constant names and adjusted reporting settings.
- Established PHPStan level to 6 for stricter analysis.

modules/empikmarketplace/vendor/autoload.php

@@ -14,12 +14,9 @@ if (PHP_VERSION_ID < 50600) {
             echo $err;
         }
     }
-    trigger_error(
-        $err,
-        E_USER_ERROR
-    );
+    throw new RuntimeException($err);
 }
 
 require_once __DIR__ . '/composer/autoload_real.php';
 
-return ComposerAutoloaderInit245c4a2a3c66452037dc17f6dafa78a8::getLoader();
+return ComposerAutoloaderInit974c010241101822312e0b9898e8be21::getLoader();