Changes:

• Support OMEMO in private MUCs
• Minimum iOS version is now 14.0
• Communication Notifications on iOS 15
• New improved and simplified notification appex
• Switched to new newer libsignal-protocol-c version
• Fixing some memory leaks
• Fixes muc invites
• Improve OMEMO e2ee
• Reduce avatar image size to ~60kb to make ejabberd throttling happy
• Support muc muting again and implement “mention only” notification mode for mucs
• Fix voice messages from conversations
• Allow deletion of history for one contact
• Add autodeletion of messages after 3 days (default: off)
• Update timeouts to make Monal work even under very bad/slow network conditions
• Add support for xmpp: invites (https://docs.modernxmpp.org/client/invites/)
• Use bigger iq timeouts to account for throttling by xmpp servers (like ejabberd)
• Remove all old VoIP code (was not working anymore)
• Prevent spurious “could not sync” errors in multi account setups
• Use less memory on incoming stanza flood (only parse ~100 stanzas at once)
• Fix error in message deduplication (some messages could be received twice)