title: _angular_core.Version is not a constructor after updating Angular 2
body: <p>I believe the problem is related to updating angular 2. My actual sequence of events that led to this error was 1. installing ng2-typeahead, 2. getting errors and realizing I needed to install FormsModule, 3. getting more errors and npm updating everything. The line of code that errors in /node_modules/@angular/common/bundles/common.umd.js:3481:36) is </p>
  
  <pre><code>/**
   * @stable
   */
  var /** @type {?} */ VERSION = new _angular_core.Version('2.3.0');
  </code></pre>
  
  <p>NPM debug log at <a href="http://pastebin.com/83wYzcxC" rel="nofollow noreferrer">npm-debug.log at pastebin</a>.</p>