fix(typings): add fallback to untyped event listener

See also: https://github.com/socketio/socket.io/commit/a11152f42b281df83409313962f60f230239c79e

Related:

- https://github.com/socketio/socket.io/issues/3885
- https://github.com/socketio/socket.io/issues/3872
- https://github.com/socketio/socket.io/issues/3833