message: fix(tabs): fixed tabs vertical pills for bs4
  fixes
diff: @@ -134,6 +134,7 @@ export class TabsetComponent implements OnDestroy {
  protected setClassMap():void {
  this.classMap = {
  'nav-stacked': this.vertical,
  + 'flex-column': this.vertical,
  'nav-justified': this.justified,
  [`nav-${this.type}`]: true
  };
  