title: Ionic 2 - Can't resolve all parameters for Storage error
body: <p>I have an Ionic 2 application where I make use of Storage.
  When I start the app, it crashes with the error message: Can't resolve all parameters for Storage: (?, ?). </p>
  
  <p>I can't seem to find the error, who can help me?</p>
  
  <p><strong>app.module.ts</strong></p>
  
  <pre><code>import { NgModule, ErrorHandler } from '@angular/core';
  import { BrowserModule } from '@angular/platform-browser';
  import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
  import { MyApp } from './app.component';
  import { Storage } from '@ionic/storage';
  
  import { AboutPage } from '../pages/about/about';
  import { ContactPage } from '../pages/contact/contact';
  import { HomePage } from '../pages/home/home';
  import { EthylenePage } from '../pages/ethylene/ethylene';
  import { PropylenePage } from '../pages/propylene/propylene';
  import { TemporaryResultPage } from '../pages/temporary-result/temporary-result';
  import { TabsPage } from '../pages/tabs/tabs';
  
  import { StatusBar } from '@ionic-native/status-bar';
  import { SplashScreen } from '@ionic-native/splash-screen';
  
  @NgModule({
    declarations: [
      MyApp,
      AboutPage,
      ContactPage,
      EthylenePage,
      PropylenePage,
      TemporaryResultPage,
      HomePage,
      TabsPage
    ],
    imports: [
      BrowserModule,
      IonicModule.forRoot(MyApp),
    ],
    bootstrap: [IonicApp],
    entryComponents: [
      MyApp,
      AboutPage,
      ContactPage,
      PropylenePage,
      EthylenePage,
      TemporaryResultPage,
      HomePage,
      TabsPage
    ],
    providers: [
      {provide: ErrorHandler, useClass: IonicErrorHandler},
      StatusBar,
      SplashScreen,
      Storage
    ]
  })
  export class AppModule {}
  </code></pre>
  
  <p>In my package.json I have added this to my dependencies section:
   "@ionic/storage": "1.1.7"</p>