[minor] Improve JSDoc-inferred types (#2242)

Author: ITenthusiasm

lib/sender.js

@@ -551,7 +551,7 @@ class Sender {
   /**
    * Sends a frame.
    *
-   * @param {Buffer[]} list The frame to send
+   * @param {(Buffer | String)[]} list The frame to send
    * @param {Function} [cb] Callback
    * @private
    */

lib/stream.js

@@ -1,5 +1,7 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^WebSocket$" }] */
 'use strict';
 
+const WebSocket = require('./websocket');
 const { Duplex } = require('stream');
 
 /**