在datepicker中 mindate只允许传入string类型

[happyfeet1996]

Version

9.0.0

Environment

angular

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-mobile-start-yhwjim?file=src%2Fapp%2Fapp.component.html,src%2Fapp%2Fapp.component.ts

Steps to reproduce

<ListItem
DatePicker
[minDate]="date"
[extra]="currentDateFormat(date, 'yyyy-mm-dd')"
[arrow]="'horizontal'"
[mode]="'date'"
[ngModel]="date"
(onOk)="onOk($event)"

date: Date = new Date();

What is expected?

在datepicker中 mindate只允许传入string类型，而传入date string会报错，但是传入date不会

What is actually happening?

传入date字符串报错

Other?