title: Angular2 error after updating to Typescript 2.1
body: <p>I have just uploaded my Angular2 project to the latest version of Typescript (from 2.0.3 to 2.1.4).
  When launching my app I do get the following error :</p>
  
  <pre><code>zone.js:242 Error: (SystemJS) Unexpected token ;
      SyntaxError: Unexpected token ;
          at eval (&lt;anonymous&gt;)
          at ZoneDelegate.invoke (http://localhost:9000/assets/lib/zone.js/dist/zone.js:242:26)
          at Zone.run (http://localhost:9000/assets/lib/zone.js/dist/zone.js:113:43)
          at http://localhost:9000/assets/lib/zone.js/dist/zone.js:520:57
          at ZoneDelegate.invokeTask (http://localhost:9000/assets/lib/zone.js/dist/zone.js:275:35)
          at Zone.runTask (http://localhost:9000/assets/lib/zone.js/dist/zone.js:151:47)
          at drainMicroTaskQueue (http://localhost:9000/assets/lib/zone.js/dist/zone.js:418:35)
          at XMLHttpRequest.ZoneTask.invoke (http://localhost:9000/assets/lib/zone.js/dist/zone.js:349:25)
      Evaluating http://localhost:9000/assets/lib/angular__platform-browser-dynamic/index.js
      Error loading http://localhost:9000/assets/lib/angular__platform-browser-dynamic/index.js as "@angular/platform-browser-dynamic" from http://localhost:9000/assets/app/bootstrap.ts
          at eval (&lt;anonymous&gt;)
          at ZoneDelegate.invoke (http://localhost:9000/assets/lib/zone.js/dist/zone.js:242:26)
          at Zone.run (http://localhost:9000/assets/lib/zone.js/dist/zone.js:113:43)
          at http://localhost:9000/assets/lib/zone.js/dist/zone.js:520:57
          at ZoneDelegate.invokeTask (http://localhost:9000/assets/lib/zone.js/dist/zone.js:275:35)
          at Zone.runTask (http://localhost:9000/assets/lib/zone.js/dist/zone.js:151:47)
          at drainMicroTaskQueue (http://localhost:9000/assets/lib/zone.js/dist/zone.js:418:35)
          at XMLHttpRequest.ZoneTask.invoke (http://localhost:9000/assets/lib/zone.js/dist/zone.js:349:25)
      Evaluating http://localhost:9000/assets/lib/angular__platform-browser-dynamic/index.js
      Error loading http://localhost:9000/assets/lib/angular__platform-browser-dynamic/index.js as "@angular/platform-browser-dynamic" from http://localhost:9000/assets/app/bootstrap.ts 
  </code></pre>
  
  <p>I have no idea what's wrong here though</p>
  
  <p>EDIT:
  My bootstrap.ts file</p>
  
  <pre><code>import { enableProdMode } from '@angular/core'
  import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'
  import { AppModule } from './app.module'
  
  // enableProdMode()
  platformBrowserDynamic().bootstrapModule(AppModule)
  </code></pre>