fix syntax error (#2)

Co-authored-by: DESKTOP-0P848CA\edinl_6z7c6t <[email protected]>

lib/Client.test.js

@@ -1,10 +1,10 @@
-import assert from 'assert';
-import http from 'http';
-import { Duplex } from 'stream';
-import WebSocket from 'ws';
-import net from 'net';
+const assert = require('assert';
+const http = require('http';
+const { Duplex } = require('stream';
+const WebSocket = require('ws';
+const net = require('net';
 
-import Client from './Client';
+const Client = require('./Client';
 
 class DummySocket extends Duplex {
     constructor(options) {