chore: bump socket.io-adapter version

Diff: https://github.com/socketio/socket.io-adapter/compare/2.0.3...2.1.0

Includes:

- add room events ([155fa63](https://github.com/socketio/socket.io-adapter/commit/155fa6333a504036e99a33667dc0397f6aede25e))
- make rooms and sids public ([313c5a9](https://github.com/socketio/socket.io-adapter/commit/313c5a9fb60d913cd3a866001d67516399d8ee2f))