Stream Management for @xmpp/client.
Included and enabled in @xmpp/client.
Supports Node.js and browsers.
When the session is resumed the online event is not emitted as session resumption is transparent.
However entity.status is set to online.
If the session fails to resume, entity will fallback to regular session establishment in which case online event will be emitted.
Automatically responds to acks but does not support requesting acks yet.