[Bug Report] TabContainer组件滑动异常

### Mint UI version
2.2.13

### OS/Browsers version
All

### Vue version
2.5.2

### Reproduction Link
[https://www.maobotv.com/moblie/index.html#/rate/anchor](https://www.maobotv.com/moblie/index.html#/rate/anchor)

### Steps to reproduce
项目已上线，地址

复现步骤：
向左滑动到一半后，手指向下滑出屏幕

### What is Expected?
正常切换Tab

### What is actually happening?
页面停留在两个Tab中间不触发touchEnd。

可否通过如下方式在滑出页面时强制触发touchEnd
```
if (e.changedTouches[0].pageY <= 0) {
e.preventDefault();
that._unbind("touchmove", window);
that.dispatchEvent(new Event("touchEnd"));
return;
}
```

Start with the TabContainer touch-gesture handling and reproduce the behavior using the linked reproduction page: swipe left, then move the finger off-screen. Trace why touchEnd is not reached and verify that the tab completes its transition normally when the gesture leaves the screen.

Written by the indexing model from the issue text.