ably 2.29.0 on Node.js NPM

Full Changelog: 2.28.0...2.29.0

What's Changed

Add PresenceMessage.memberKey, the key that uniquely identifies a presence member by its connectionId and clientId #2302
Respond to server PING protocol messages with a PONG, and request heartbeats=bounce in browsers, React Native and NativeScript. Liveness is now confirmed by the SDK itself rather than by the underlying WebSocket, which can keep answering ping frames while the app is suspended #2307
Fix IPv6 hosts missing their square brackets in constructed URIs #2300
Reject annotation publish and delete calls that are missing a type #2299
LiveObjects: fail a pending get() sync wait when the channel enters DETACHED, SUSPENDED or FAILED, rather than waiting indefinitely #2284
LiveObjects: suppress update events for no-op diffs, and skip the sync wait when resolving an empty synthetic list #2288
LiveObjects: report error 92000 with HTTP status 400 rather than 500 #2290