Fixed automatically generated e2e-test

[examples/angular-tour-of-heroes] / e2e / src / app.po.ts

import { browser, by, element } from 'protractor';

export class AppPage {
  navigateTo() {
    return browser.get(browser.baseUrl) as Promise<any>;
  }

  getTitleText() {
    return element(by.css('app-root > h1')).getText() as Promise<string>;
  }
}