fix: update phpstan config and add condition to package setup in src/QUI/ERP/Coupons/Events.php

This commit includes a minor modification in the `phpstan.dist.neon` file where the `excludePaths`
value has been updated. Besides, a conditional check has been added in the `onPackageSetup`
function, under `Events.php` in the `src/QUI/ERP/Coupons` directory, to only proceed if the package
name is 'quiqqer/coupons'. This additional check generally improves the efficiency and correctness
of the package setup process.

phpstan.dist.neon

@@ -9,4 +9,4 @@ parameters:
     bootstrapFiles:
         - tests/phpstan-bootstrap.php
     excludePaths:
-        - src/QUI/ERP/Coupons/Products/DigitalCouponProductType.php
+        - src/QUI/ERP/Coupons/Events.php

src/QUI/ERP/Coupons/Events.php

@@ -44,6 +44,10 @@ class Events
      */
     public static function onPackageSetup(QUI\Package\Package $Package): void
     {
+        if ($Package->getName() !== 'quiqqer/coupons') {
+            return;
+        }
+
         try {
             self::createProductFields();
         } catch (Exception $Exception) {