[Bug Report] IE input's type is textarea ,its height cannot autosize

### Element UI version
2.15.5

### OS/Browsers version
ie 111

### Vue version
2.6.14

### Reproduction Link
https://codepen.io/pen/

### Steps to reproduce
Jump to: text field with adaptive text height

Input characters. When the second line is near the end, a new line appears below. At this time, the second line is not finished

### What is Expected?
Only after the current line is entered, a new line is added

### What is actually happening?
If the current line cannot be completely entered, a new line will be added