worker: make MessagePort inherit from EventTarget

Use `NodeEventTarget` to provide a mixed `EventEmitter`/`EventTarget`
API interface.

PR-URL: https://github.com/nodejs/node/pull/34057
Refs: https://twitter.com/addaleax/status/1276289101671608320
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

benchmark/worker/messageport.js

@@ -4,6 +4,7 @@ const common = require('../common.js');
 const { MessageChannel } = require('worker_threads');
 const bench = common.createBenchmark(main, {
   payload: ['string', 'object'],
+  style: ['eventtarget', 'eventemitter'],
   n: [1e6]
 });
 
@@ -25,14 +26,26 @@ function main(conf) {
   const { port1, port2 } = new MessageChannel();
 
   let messages = 0;
-  port2.onmessage = () => {
+  function listener() {
     if (messages++ === n) {
       bench.end(n);
       port1.close();
     } else {
       write();
     }
-  };
+  }
+
+  switch (conf.style) {
+    case 'eventtarget':
+      port2.onmessage = listener;
+      break;
+    case 'eventemitter':
+      port2.on('message', listener);
+      break;
+    default:
+      throw new Error('Unsupported listener type');
+  }
+
   bench.start();
   write();