title: Migration from angular 5 to angular 6 - changes in @angular/core
body: <p>I've upgraded my project from angular 5.2.9 to angular 6.0.0-rc.5.</p>
  
  <p>Except few quick RxJS fixes in the packages path, all looks good.
  (This link was quiet helpful : <a href="https://stackoverflow.com/questions/48970553/want-to-upgrade-project-from-angular-5-to-angular-6">Want to upgrade project from Angular 5 to Angular 6</a>)</p>
  
  <p>But, for some reason i'm encountering a issue with the AnimationEntryMetadata inside the @angular/core module.</p>
  
  <p>I was importing:</p>
  
  <pre><code>import {AnimationEntryMetadata} from '@angular/core';
  </code></pre>
  
  <p>In order to create animations. But now i'm getting the following error:</p>
  
  <p><strong>Module ../node_modules/@angular/core/core"' has no exported member 'AnimationEntryMetadata'</strong></p>
  
  <p><strong>Did anybody encounter this issue has well?</strong></p>
  
  <p>I compared the two @angular/core files between the two versions and found some changes (marked in different color for each version), you can see that the 
  "AnimationEntryMetadata" is missing in the newer version:
  <a href="https://i.stack.imgur.com/YjCLA.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YjCLA.jpg" alt="enter image description here"></a></p>