message: fix(ns-router-link): convert clearHistory string to boolean
  fixes
diff: @@ -84,13 +84,17 @@ export class NSRouterLink implements OnChanges { // tslint:disable-line:directiv
  return {
  queryParams: this.queryParams,
  fragment: this.fragment,
  - clearHistory: this.clearHistory,
  + clearHistory: this.convertClearHistory(this.clearHistory),
  animated: transition.animated,
  transition: transition.transition,
  relativeTo: this.currentRoute,
  };
  }
  + private convertClearHistory(value: boolean | string): boolean {
  + return value === true || value === "true";
  + }
  +
  private getTransition(): { animated: boolean, transition?: NavigationTransition } {
  if (typeof this.pageTransition === "boolean") {
  return { animated: <boolean>this.pageTransition };
  