Enable strictTemplates

[xiaoxiangmoe]

https://angular.cn/guide/template-typecheck#strict-mode

[dylanvdmerwe]

We have this enabled in our project and Zorro library 9.0.1 causes many errors with strict checking enabled. Please can this be looked into so this can be enabled in our projects.

[Iyashu5040]

Please look into enabling this.

There are numerous issues when trying to build a project with the setting enabled.
Angular Version: 9.1.1
"ng-zorro-antd": "9.0.1"

Example Error:
NzSelect binding a templateRef to nzNotFoundContent throws: Type 'TemplateRef<any>' is not assignable to type 'string'. The docs at https://ng.ant.design/components/select/en specify that the type of nzNotFoundContent is string | TemplateRef<void> but I am unable to bind a template ref. This is because the type of nzNotFoundContent in node_modules is nzNotFoundContent: string | undefined;