The ClusterAdapter class has been moved to [1], so that this adapter
only needs to implement to pub/sub mechanism.
Also, [2] should reduce the number of "timeout reached: only x
responses received out of y" errors, since the fetchSockets() requests
will now succeed even if a server leaves the cluster.
[1]: https://github.com/socketio/socket.io/tree/main/packages/socket.io-adapter
[2]: 0e23ff0cc6
This should (at least in theory) fix sync issues for the
`socket.io-adapter` package, which is imported by both the `socket.io`
and `@socket.io/cluster-adapter` packages:
- `socket.io@4.5.0` should resolve `socket.io-adapter@~2.4.0`
- `socket.io@4.6.0` should resolve `socket.io-adapter@~2.5.0`
This feature was added in `socket.io@4.5.0`:
```js
io.timeout(1000).emit("some-event", (err, responses) => {
// ...
});
```
Thanks to this change, it will now work with multiple Socket.IO
servers.
Related: https://github.com/socketio/socket.io/issues/4163
