fix: 修复部分情况小程序事件报错的问题

src/core/runtime/wrapper/util.js

@@ -287,7 +287,7 @@ function wrapper (event) {
 
   event.target = event.target || {}
 
-  if (!hasOwn(event, 'detail')) {
+  if (!hasOwn(event, 'detail') || !event.detail) {
     event.detail = {}
   }
 

src/platforms/mp-alipay/runtime/wrapper/util.js

@@ -59,7 +59,7 @@ export function initSpecialMethods (mpInstance) {
     specialMethods.forEach(method => {
       if (isFn(mpInstance.$vm[method])) {
         mpInstance[method] = function (event) {
-          if (!hasOwn(event, 'detail')) {
+          if (!hasOwn(event, 'detail') || !event.detail) {
             event.detail = {}
           }
           if (!('markerId' in event.detail) && 'markerId' in event) {