title: Getting error in adding dependencies for firebase-ui-auth
body: <p>Since it is required to use FirebaseUI Version as per the Firebase/Play Services Version,
  I am adding:</p>
  
  <pre><code>compile 'com.google.firebase:firebase-core:10.2.1'
  compile 'com.google.firebase:firebase-auth:10.2.1'
  compile 'com.firebaseui:firebase-ui-auth:1.2.0'
  </code></pre>
  
  <p>and the only play services available for the app is:</p>
  
  <pre><code> compile 'com.google.android.gms:play-services-auth:10.2.1'
  </code></pre>
  
  <p>but Firebase UI libraries (1.2.0) still have a dependency on versions 10.2.0 of various play service libraries: <a href="https://github.com/firebase/FirebaseUI-Android" rel="noreferrer">https://github.com/firebase/FirebaseUI-Android</a>.</p>
  
  <p>These are the latest versions of all the dependencies, but it's failed to resolve in Studio.</p>
  
  <p>Need some help!
  Thanks in advance :) </p>