spec: was cloudevents considered for formatting the webhook payload?

[rikbosch]

https://cloudevents.io/ is standard that is used by most cloudvendors for exchanging events between systems.

A webhook payload looks a lot like a cloudevent payload, or is there a significant difference?

Leaning on an already used standard like cloud-events for payloads might increase the adoption of this standard. This also focusses this standard on the consumer / producer interactions (like security, reliability).