wasi: use kEmptyObject

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

Author: LiviaMedeiros

lib/wasi.js

@@ -13,7 +13,10 @@ const {
   ERR_INVALID_ARG_TYPE,
   ERR_WASI_ALREADY_STARTED
 } = require('internal/errors').codes;
-const { emitExperimentalWarning } = require('internal/util');
+const {
+  emitExperimentalWarning,
+  kEmptyObject,
+} = require('internal/util');
 const { isArrayBuffer } = require('internal/util/types');
 const {
   validateArray,
@@ -55,7 +58,7 @@ function setupInstance(self, instance) {
 }
 
 class WASI {
-  constructor(options = {}) {
+  constructor(options = kEmptyObject) {
     validateObject(options, 'options');
 
     if (options.args !== undefined)