async_hooks: use kEmptyObject

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

lib/async_hooks.js

@@ -20,6 +20,7 @@ const {
   ERR_ASYNC_TYPE,
   ERR_INVALID_ASYNC_ID
 } = require('internal/errors').codes;
+const { kEmptyObject } = require('internal/util');
 const {
   validateFunction,
   validateString,
@@ -156,7 +157,7 @@ function createHook(fns) {
 const destroyedSymbol = Symbol('destroyed');
 
 class AsyncResource {
-  constructor(type, opts = {}) {
+  constructor(type, opts = kEmptyObject) {
     validateString(type, 'type');
 
     let triggerAsyncId = opts;