set protocol when connecting

src/PromiseIO/Client.ts

@@ -5,13 +5,13 @@ import * as socketio from 'socket.io-client'
 
 export class PromiseIOClient {
     
-    static connect = (port: number, host = "localhost"): Promise<I.Socket> => new Promise((res, rej) => {
+    static connect = (port: number, host = "localhost", protocol : 'http:' | 'https:' = "http:"): Promise<I.Socket> => new Promise((res, rej) => {
         try {
-            const socket = socketio(`http://${host}:${port}`, {
+            const socket = socketio(`${protocol}//${host}:${port}`, {
                 reconnectionAttempts: 2,
                 reconnectionDelay: 200,
                 timeout: 450,
-                reconnection: false
+                reconnection: false,
             })
             socket.on('connect_error', e => {
                 sock.emit('error', e)