[Bug Report]Page 组件修改电梯内值触发on-page-size-change事件

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Environment

window10， vue最新版本

Reproduction link

https://www.iviewui.com/view-ui-plus/component/navigation/page

Steps to reproduce

1、page组件添加 show-elevator 2、监听组件的on-page-size-change

What is expected?

Page 组件修改电梯内值触发on-page-size-change事件

What is actually happening?

Page 组件修改电梯内值触发on-page-size-change事件

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