worker: use kEmptyObject

PR-URL: #43159
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: LiviaMedeiros

lib/internal/worker.js

@@ -55,6 +55,7 @@ const {
 } = workerIo;
 const { deserializeError } = require('internal/error_serdes');
 const { fileURLToPath, isURLInstance, pathToFileURL } = require('internal/url');
+const { kEmptyObject } = require('internal/util');
 const { validateArray } = require('internal/validators');
 
 const {
@@ -118,7 +119,7 @@ function assignEnvironmentData(data) {
 }
 
 class Worker extends EventEmitter {
-  constructor(filename, options = {}) {
+  constructor(filename, options = kEmptyObject) {
     super();
     debug(`[${threadId}] create new worker`, filename, options);
     if (options.execArgv)

lib/internal/worker/io.js

@@ -18,7 +18,10 @@ const {
   SymbolFor,
 } = primordials;
 
-const { kEnumerableProperty } = require('internal/util');
+const {
+  kEmptyObject,
+  kEnumerableProperty,
+} = require('internal/util');
 
 const {
   handle_onclose: handleOnCloseSymbol,
@@ -123,7 +126,7 @@ class MessageEvent extends Event {
     lastEventId = '',
     source = null,
     ports = [],
-  } = {}) {
+  } = kEmptyObject) {
     super(type);
     this[kData] = data;
     this[kOrigin] = `${origin}`;