Bug: createWebSocker option prevents from using custom WebSocket types

[JulioMh]

When trying to create a new WebSocketAsPromised using TypeScript, compiler throws an error if your WebSocket object is coming from some library such WebSocket-Node

Code:

import WebSocketAsPromised from 'websocket-as-promised' 
import websocket from 'websocket'

const W3CWebSocket = websocket.w3cwebsocket

const ws = new WebSocketAsPromised('xxxx', {
  createWebSocket: url => new W3CWebSocket(url)
})

Error:

Type '(url: string) => w3cwebsocket' is not assignable to type '(url: string) => WebSocket'.
  Type 'w3cwebsocket' is missing the following properties from type 'WebSocket': addEventListener, removeEventListener, dispatchEvent

Cause (type/options.d.ts):

export = Options;

declare interface Options {
    createWebSocket?: (url: string) => WebSocket; <------------ maybe add | any (?)
    packMessage?: (data: any) => string | ArrayBuffer | Blob;
    unpackMessage?: (data: string | ArrayBuffer | Blob) => any;
    attachRequestId?: (data: any, requestId: string | number) => any;
    extractRequestId?: (data: any) => string | number | undefined;
    extractMessageData?: (event: any) => any;
    timeout?: number;
    connectionTimeout?: number;
}

Solution from client code

import WebSocketAsPromised from 'websocket-as-promised' 
import websocket from 'websocket'

const W3CWebSocket = websocket.w3cwebsocket

const ws = new WebSocketAsPromised('xxxx', {
  createWebSocket: url => new W3CWebSocket(url) as any
})