[Bug Report] 滑动切换swipe时indicators激活有延时

### Mint UI version
2.2.13

### OS/Browsers version
ios的微信浏览器、qq浏览器、夸克浏览器

### Vue version
2.5.2

### Reproduction Link
[//elemefe.github.io/mint-ui/#/swipe](//elemefe.github.io/mint-ui/#/swipe)

### Steps to reproduce
滑动切换图片,观察图片和indicator的激活时间差

### What is Expected?
滑动切换图片，图片切换，同时激活对应indicator

### What is actually happening?
滑动切换图片，indicators比图片滞后2s左右