Version 5.1.0

• Run migrations across a multisite network via a background task (#48).
• Store public API keys based on the site URL, enabling better handling of domain changes (#52).
• Add the wp101_excluded_topics filter (#53).

   /**
    * Exclude "some-video-slug" and "some-plugin.legacy_id" from appearing in
    * the WP101 video playlist.
    */
   add_filter( 'wp101_excluded_topics', function ( $topics ) {
     $topics[] = 'some-video-slug';
     $topics[] = 'some-plugin.legacy_id';
  
     return $topics;
   } );