ngb-tabset tabChange not working

Bug description:

tabChange is not triggered when tab is changed

Link to minimally-working plunker that reproduces the issue:

template:
<ngb-tabset #wizardTabs="ngbTabset" (tabChange)="onTabChange($event)">

Component:

onTabChange($event: NgbTabChangeEvent) {
    console.info('onTabChange=' + $event.activeId);
  }

In component I change tabs with function:

goToTab(tabId: string) {
    this.wizardTabs.select(tabId);
  }  

Version of Angular, ng-bootstrap, and Bootstrap:

Angular: 6.0.9
ng-bootstrap: 2.2.0
Bootstrap: 4.1.2