New shipment response field 'customer_number'

We have introduced customer_number on shipment responses.

customer_number allows you to identify the shipping agreement used for the shipment(s).

The field is available on all response bodies representing shipments. e.g. List all shipments

Example - Own agreement

{
  ...
  "customer_number": "12345678",
  ...
}

Example - Shipmondo agreement

{
  ...
  "customer_number": null,
  ...
}