fix multiple events

src/runtime/vdom/modules/events.js

@@ -1,9 +1,8 @@
 function arrInvoker (arr) {
-  return function () {
-    // Special case when length is two, for performance
-    arr.length === 2
-      ? arr[0](arr[1])
-      : arr[0].apply(undefined, arr.slice(1))
+  return function (ev) {
+    for (let i = 0; i < arr.length; i++) {
+      arr[i](ev)
+    }
   }
 }