feat: add support for catch-all listeners for outgoing packets

This is similar to `onAny()`, but for outgoing packets.

Syntax:

```js
socket.onAnyOutgoing((event, ...args) => {
  console.log(event);
});
```

Related: https://github.com/socketio/socket.io/commit/531104d332690138b7aab84d5583d6204132c8b4