v21.2.0

✨ Features

• Make calls go back to 'connecting' state when media lost (#2880).
• Add ability to send unthreaded receipt (#2878).
• Add way to abort search requests (#2877).
• sliding sync: add custom room subscriptions support (#2834).
• webrtc: add advanced audio settings (#2434). Contributed by @MrAnno.
• Add support for group calls using MSC3401 (#2553).
• Make the js-sdk conform to tsc --strict (#2835). Fixes #2112 #2116 and #2124.
• Let leave requests outlive the window (#2815). Fixes element-hq/element-call#639.
• Add event and message capabilities to RoomWidgetClient (#2797).
• Misc fixes for group call widgets (#2657).
• Support nested Matrix clients via the widget API (#2473).
• Set max average bitrate on PTT calls (#2499). Fixes element-hq/element-call#440.
• Add config option for e2e group call signalling (#2492).
• Enable DTX on audio tracks in calls (#2482).
• Don't ignore call member events with a distant future expiration date (#2466).
• Expire call member state events after 1 hour (#2446).
• Emit unknown device errors for group call participants without e2e (#2447).
• Mute disconnected peers in PTT mode (#2421).
• Add support for sending encrypted to-device events with OLM (#2322). Contributed by @robertlong.
• Support for PTT group call mode (#2338).

🐛 Bug Fixes

• Fix registration add phone number not working (#2876). Contributed by @bagvand.
• Use an underride rule for Element Call notifications (#2873). Fixes element-hq/element-web#23691.
• Fixes unwanted highlight notifications with encrypted threads (#2862).
• Extra insurance that we don't mix events in the wrong timelines - v2 (#2856). Contributed by @MadLittleMods.
• Hide pending events in thread timelines (#2843). Fixes element-hq/element-web#23684.
• Fix pagination token tracking for mixed room timelines (#2855). Fixes element-hq/element-web#23695.
• Extra insurance that we don't mix events in the wrong timelines (#2848). Contributed by @MadLittleMods.
• Do not freeze state in initialiseState() (#2846).
• Don't remove our own member for a split second when entering a call (#2844).
• Resolve races between initLocalCallFeed and leave (#2826).
• Add throwOnFail to groupCall.setScreensharingEnabled (#2787).
• Fix connectivity regressions (#2780).
• Fix screenshare failing after several attempts (#2771). Fixes element-hq/element-call#625.
• Don't block muting/unmuting on network requests (#2754). Fixes element-hq/element-call#592.
• Fix ICE restarts (#2702).
• Target widget actions at a specific room (#2670).
• Add tests for ice candidate sending (#2674).
• Prevent exception when muting (#2667). Fixes element-hq/element-call#578.
• Fix race in creating calls (#2662).
• Add client.waitUntilRoomReadyForGroupCalls() (#2641).
• Wait for client to start syncing before making group calls (#2632). Fixes #2589.
• Add GroupCallEventHandlerEvent.Room (#2631).
• Add missing events from reemitter to GroupCall (#2527). Contributed by @toger5.
• Prevent double mute status changed events (#2502).
• Don't mute the remote side immediately in PTT calls (#2487). Fixes element-hq/element-call#425.
• Fix some MatrixCall leaks and use a shared AudioContext (#2484). Fixes element-hq/element-call#412.
• Don't block muting on determining whether the device exists (#2461).
• Only clone streams on Safari (#2450). Fixes element-hq/element-call#267.
• Set PTT mode on call correctly (#2445). Fixes element-hq/element-call#382.
• Wait for mute event to send in PTT mode (#2401).
• Handle other members having no e2e keys (#2383). Fixes element-hq/element-call#338.
• Fix races when muting/unmuting (#2370).