[Bug Report] el-calendar 使用range的时候无法选中当前日期

### Element UI version
2.13.2

### OS/Browsers version
win10

### Vue version
3.0.0-beta.14

### Reproduction Link
https://codepen.io/liu_doudou/pen/QWyWRdz?editable=true%3Dhttps%3A%2F%2Felement.eleme.cn%2F

### Steps to reproduce
设置了 first-day-of-week="7" range 为当前所在周。当前日期不会出现选中状态

### What is Expected?
有选中状态

### What is actually happening?
无选中状态