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/classes/EmpikOrder.php

@@ -8,6 +8,7 @@ class EmpikOrder extends ObjectModel
     public $empik_order_carrier;
     public $empik_payment;
     public $empik_carrier;
+    public $empik_tracking_number;
     public $empik_pickup_point;
     public $empik_vat_number;
     public $date_add;
@@ -39,6 +40,10 @@ class EmpikOrder extends ObjectModel
                 'validate' => 'isCleanHtml',
                 'required' => true,
             ],
+            'empik_tracking_number' => [
+                'type' => self::TYPE_STRING,
+                'validate' => 'isTrackingNumber',
+            ],
             'empik_pickup_point' => [
                 'type' => self::TYPE_STRING,
                 'validate' => 'isCleanHtml',