events: protect property defs against prototype polution

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: #39773
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: jasnell

lib/internal/worker/io.js

@@ -142,6 +142,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   origin: {
     get() {
@@ -151,6 +152,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   lastEventId: {
     get() {
@@ -160,6 +162,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   source: {
     get() {
@@ -169,6 +172,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
   ports: {
     get() {
@@ -178,6 +182,7 @@ ObjectDefineProperties(MessageEvent.prototype, {
     },
     enumerable: true,
     configurable: true,
+    set: undefined,
   },
 });