message: fix(nav): add default nav items
diff: @@ -7,7 +7,7 @@ import { Outbound } from '../../icons';
  styleUrl: 'nav.css'
  })
  export class DocsNav {
  - @Prop() items: MenuItems;
  + @Prop() items: MenuItems = {};
  toItem = ([text, value]) => {
  switch (typeof value) {
  