Changelog (v5.3.0-BETA2...v5.3.0-BETA3)
- bug #40982 Fix return SentMessage then Messenger not used (WaylandAce)
- feature #40992 Add SlackOptions::threadTs() to send message as reply (WaylandAce)
- bug #41078 Make FailoverTransport always pick the first transport (jschaedl)
- bug #40955 Fix missed messageId for SendMessage object in slack notifier (WaylandAce)