message: feature(tabs): Export Tab-Directive as 'tab'
diff: @@ -12,7 +12,7 @@ import {
  } from '@angular/core';
  import { TabsetComponent } from './tabset.component';
  -@Directive({ selector: 'tab, [tab]' })
  +@Directive({ selector: 'tab, [tab]', exportAs: 'tab' })
  export class TabDirective implements OnInit, OnDestroy {
  /** tab header text */
  @Input() heading: string;
  