fix(mp): kebab-case event (#3616)

packages/uni-mp-core/src/runtime/util.ts

-import { hasOwn, isArray } from '@vue/shared'
+import { hasOwn, isArray, hyphenate } from '@vue/shared'
 import {
   ComponentOptions,
   ComponentInternalInstance,
@@ -142,17 +142,20 @@ export function handleEvent(
   // 快手小程序的 __l 方法也会走此处逻辑，但没有 __ins__
   if (__ins__) {
     // 自定义事件，通过 triggerEvent 传递 __ins__
-    methodName = (__ins__.properties[EVENT_OPTS] || {})[type]
+    methodName = resolveMethodName(type, __ins__.properties[EVENT_OPTS] || {})
   } else if (dataset && dataset[EVENT_OPTS]) {
     // 快手小程序 input 等内置组件的 input 事件也会走此逻辑，所以从 dataset 中读取
-    methodName = dataset[EVENT_OPTS][type]
+    methodName = resolveMethodName(type, dataset[EVENT_OPTS])
   }
-
   if (!(this as any)[methodName]) {
     return console.warn(type + ' not found')
   }
   ;(this as any)[methodName](event)
 }
+
+function resolveMethodName(name: string, obj: Record<string, string>) {
+  return obj[name] || obj[hyphenate(name)]
+}
 /**
  * @param properties
  */