nz-mention: suggestions not selectable on any touch devices (mobile/ipad)

[singara-velan]

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-start-ntzj88?file=src/app/app.component.html

Steps to reproduce

Above link or open the official demo of ng-mention in any mobile/ipad device, press '@', the suggestiosn will be shown but would not be able to select one.

What is expected?

ng-mention - suggestion should be able to selectable in touch devices as similar to the react version

What is actually happening?

ng-mention - suggestion is not selectable on any mobile/touch devices.

Environment	Info
ng-zorro-antd	8.3.1
Browser	Android, Chrome, iOS - Safarai, chrome