fix syntax error (#2)

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

lib/ClientManager.js

@@ -1,8 +1,8 @@
-import { hri } from 'human-readable-ids';
-import Debug from 'debug';
+const { hri } = require('human-readable-ids');
+const Debug = require('debug');
 
-import Client from './Client';
-import TunnelAgent from './TunnelAgent';
+const Client = require('./Client');
+const TunnelAgent = require('./TunnelAgent');
 
 // Manage sets of clients
 //
@@ -93,4 +93,4 @@ class ClientManager {
     }
 }
 
-export default ClientManager;
+module.exports = ClientManager;