Updates to Deliveries - API

Delivery and all relative phrasing have been changed to Shipment in order to align better with internal and external standards.

You can review the recent changes in the Shipments API Documentation.

Below is a quick-reference for the changes we have implemented:

- Renamed `OrderDelivery` resource to `OrderShipment`
- Renamed `/orders/:id/deliveries` endpoints to `/orders/:id/shipments` 
- Renamed `/orders/:id/deliveries/:id` endpoints to `/orders/:id/shipments/:id` 
- Renamed `deliveryStatus` enum on `OrderShipment` object to `shipmentStatus`
- Rename `deliveryStatus` enum 'OrderDeliveryOpen' to 'OrderShipmentOpen'
- Rename `deliveryStatus` enum 'OrderDeliveryInTransit' to 'OrderShipmentInTransit'
- Rename `deliveryStatus` enum 'OrderDeliveryReceived' to 'OrderShipmentReceived'
- Rename `deliveryStatus` enum 'OrderDeliveryCancelled' to 'OrderShipmentCancelled'
- Rename `deliveryStatus`  enum 'OrderDeliveryDeleted' to 'OrderShipmentDeleted'