Vonage server does not send network-code property in DeliveryReceipt JSON Payload

[repli2dev]

Expected Behavior

DeliveryReceipt class should be able to construct the object for payloads that comes in Vonage webooks.

Current Behavior

Delivery Receipt missing required datanetwork-code` on this payload

{
"api-key": "<CENSORED>",
"err-code": "7",
"message-timestamp": "2023-09-10 23:20:37",
"messageId": "<UUID>",
"msisdn": "<CENSORED>",
"price": "0",
"scts": "23091012334",
"status": "failed",
"to": "<CENSORED>"
}

Possible Solution

Make the field optionally the same way as scts in #416

Steps to Reproduce (for bugs)

Attempt to create DeliveryReceipt object from above payload.

Context

Started od Monday 11 around midnight, we have like 60 of such issues per hour.

Your Environment

• Version used: 4.3.1
• Environment name and version: PHP 8.2 with nginx
• Operating System and version: Linux Alpine

[SecondeJK]

Fixed in #438