v15.5.0

✨ Features

• Support m.asset in m.location event content (#2109).
• Send extensible events structure and support on-demand parsing (#2091).
• Support cancelling events whilst they are in status = ENCRYPTING (#2095).

🐛 Bug Fixes

• Fix http-api butchering idServer requests (#2134). Fixes element-hq/element-web#20680.
• Don't remove streams that still have tracks (#2104).