[bug report] El input cannot enter 0 after decimal point

### Element UI version
2.13.2

### OS/Browsers version
windows10/Chrome81.0.4044.138

### Vue version
2.6.10

### Reproduction Link
https://codepen.io/li-guojiang/pen/LYpXyMO

### Steps to reproduce

如输入11.04时，无法完成。小数点后0无法输入
如果去掉type="number" 则无法输入小数

### What is Expected?
能正常输入

### What is actually happening?
无法正常输入