Reverted: removed unnecessary changes in the ShipmentService file(#416)

src/services/ShipmentService.ts

@@ -113,12 +113,13 @@ const fetchShipmentAttributes = async (shipmentIds: Array<string>): Promise<any>
   return shipmentAttributes;
 }
 
+
 export const ShipmentService = {
   fetchShipments,
   fetchShipmentAttributes,
   fetchTrackingCodes,
   getShipmentDetail,
   receiveShipmentItem,
   receiveShipment,
-  addShipmentItem,
+  addShipmentItem
 }