Why is there a direct dependency on @angular/cdk?

[JoepKockelkorn]

NG-ZORRO has a direct dependency on the angular CDK. It is causing a typescript interface version conflict when building our app(s). Using any compatible higher minor version works just fine at runtime as angular follows the semver guidelines pretty strict.

Is there a reason why NG-ZORRO is not using peerDependencies? For library users it has benefits over dependencies as stated in this article.

I hope that you consider it!