Is your feature request related to a problem? Please describe.
Currently we don't have a way to get the timestamp of when the events really happened. In wechat's world, when the account is not online, the event is queued up, and once the account is online, events will be pushed. If we use the timestamp that the event is triggered, it is not accurate, sometimes, it will have few hours or even days delay. So I would like to have the timestamp value emitted together in the room/friendship events.

Describe the solution you'd like
In the listener function of room/friendship functions, add timestamp as the last parameter.

Describe alternatives you've considered
No alternatives considered.

Additional context
No

[enhancement]