Merge pull request #131 from Invertus/compatibility-fix

Compatibility fix

src/Repository/ProductRepository.php

@@ -260,7 +260,7 @@ public function findProductByProductReference($carrierReference)
      * @return array|bool|mysqli_result|PDOStatement|resource|null
      * @throws PrestaShopDatabaseException
      */
-    public function checkIfCarrierIsAvailableInCountry(int $carrierReference, int $countryId)
+    public function checkIfCarrierIsAvailableInCountry($carrierReference, $countryId)
     {
         $productId = $this->getProductIdByCarrierReference($carrierReference);
         $product = new DPDProduct($productId);