Element: [Bug Report] input type="number" 使用中文输入法时文本框换行（光标位置偏上）

[GODSEULGI]

Element UI version

2.10.0

OS/Browsers version

macOS Mojave/Chrome 75.0.3770.100

Vue version

2.6.10

Reproduction Link

https://jsfiddle.net/s5cpwr0d/

Steps to reproduce

使用中文输入法输入后space或者enter

What is Expected?

文本框不会换行（光标位置正确）

What is actually happening?

文本框换行（光标位置在上）

应该是行高样式问题导致的，目前这样解决了：

.el-input__inner[type="number"] {

line-height: inherit;

}

[island205]

We will fix this issue in next major candidate.

[varyzheng]

@GODSEULGI I tried your solution, but it's not worked for me. I fixed it by this way:
```js
document.querySelector('#app').addEventListener('input', (e) => {
const target = e.target
if (target.className.indexOf('el-input__inner') > -1 && target.type === 'number' && e.data === '' && target.value === '') {
target.value = 0
target.value = ''
}
})
````

[CBCzed]

目前使用了line-height: 1解决了这个问题

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.