v34.3.0

✨ Features

• Bump matrix-widget-api (#4336). Contributed by @AndrewFerr.
• Also check for MSC3757 for session state keys (#4334). Contributed by @AndrewFerr.
• Support Futures via widgets (#4311). Contributed by @AndrewFerr.
• Support MSC4140: Delayed events (Futures) (#4294). Contributed by @AndrewFerr.
• Handle late-arriving m.room_key.withheld messages (#4310). Contributed by @richvdh.
• Be specific about what is considered a MSC4143 call member event. (#4328). Contributed by @toger5.
• Add index.ts for matrixrtc module (#4314). Contributed by @toger5.

🐛 Bug Fixes

• Fix hashed ID server lookups with no Olm (#4333). Contributed by @dbkr.