[adapters] 增加小游戏适配部分源码

adapters/platforms/bytedance/wrapper/builtin/Event.js

@@ -0,0 +1,14 @@
+import {noop} from './util'
+
+export default class Event {
+  cancelBubble = false
+  cancelable = false
+  target = null
+  timestampe = Date.now()
+  preventDefault = noop
+  stopPropagation = noop
+
+  constructor(type) {
+    this.type = type
+  }
+}