update shipment rate

lib/vo/pickup.dart

@@ -1,3 +1,5 @@
+import 'cargo.dart';
+
 class PickUp {
   String id;
   String userName;
@@ -10,6 +12,7 @@ class PickUp {
   String address;
   String status;
   DateTime date;
+  List<Cargo> cargoTypes;
 
   PickUp(
       {this.id,
@@ -22,7 +25,8 @@ class PickUp {
       this.handlingFee,
       this.address,
       this.status,
-      this.date});
+      this.date,
+      this.cargoTypes});
 
   int get last => DateTime.now().difference(date).inDays;