fix: @dcloudio/uni-components export type

packages/uni-components/src/index.ts

 export * from './components'
 export { useOn, useSubscribe } from './helpers/useSubscribe'
-export {
-  withWebEvent,
-  useCustomEvent,
-  CustomEventTrigger,
-  EmitEvent,
-} from './helpers/useEvent'
+export { withWebEvent, useCustomEvent } from './helpers/useEvent'
+export type { CustomEventTrigger, EmitEvent } from './helpers/useEvent'
 export { useUserAction } from './helpers/useUserAction'
 export { useAttrs } from './helpers/useAttrs'