title: AngularFireStorageModule Not found
body: <p>Im using angularfire2 for my ionic project.when i going to add AngularFireStorageModule to the app.module.ts its show there is no AngularFireStorageModule.this the version i use</p>
  
  <blockquote>
    <p>firebase": "^4.6.0, / angularfire2": "^5.0.0-rc.3 </p>
    
    <p>@angular/core": "5.2.9</p>
  </blockquote>
  
  <p>when i update it to the latest version this error occurs in terminal.after i import this its says unused import.</p>
  
  <blockquote>
    <p>import { app, auth, database, firestore, functions, messaging, storage
    } from 'firebase/app';</p>
  </blockquote>
  
  <p>older version works fine for me but only problem is it doesn't  import StorageModule.how to slove this problem</p>