title: Plugin with id 'androidx.navigation.safeargs' not found
body: <p>When I try to add Safe Args (Android Navigation) to my app's as following</p>
  
  <p>( using this guide : <a href="https://developer.android.com/topic/libraries/architecture/navigation/navigation-pass-data" rel="noreferrer">https://developer.android.com/topic/libraries/architecture/navigation/navigation-pass-data</a> ) :</p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'androidx.navigation.safeargs'
  
  apply plugin: 'kotlin-android'
  
  apply plugin: 'kotlin-android-extensions'
  apply plugin: 'com.google.gms.google-services'
  
  android {...
  </code></pre>
  
  <p>I receive this error :</p>
  
  <blockquote>
    <p><strong>Plugin with id 'androidx.navigation.safeargs' not found.</strong></p>
  </blockquote>