Better socket.off events name type.

[AbdUlHamedMaree]

Describe the bug
when I start using socket.io-client with typescript, I initilized my socket with the following code:

const socket:Socket<ListenerEvents, EmitEvents> = io('URL');

so if I use socket.on it will help me with ListenersEvents types, but when using socket.off it will not.

To Reproduce
the above code.

Expected behavior
the function socket.off be better in types.

Platform:

• Device: Lenovo
• OS: Ubuntu

Additional context
I looked at the typed-events.d.ts file and it looks like StrictEventEmitter extends from the Emitter interface without passing the names of the events, but on the other hand, the StrictEventEmitter class has implements the same functions that exist in the Emitter interface (why?!) so implement the off function and that's it!.

I think this is enough to explain the bug and the solution.

[darrachequesne]

Hi! The StrictEventEmitter class indeed does not cover the whole API of the Emitter.

Would you have time to open a pull request for this? Thanks!

[darrachequesne]

Fixed by #1502