onPlayerReady = (player, options) => {
  player.addClass('vjs-hls-quality-selector');
  player.hlsQualitySelector = new HlsQualitySelectorPlugin(player, options);
}
Function to invoke when the player is ready.

This is a great place for your plugin to initialize itself. When this
function is called, the player will have its DOM and child components
in place.

@function onPlayerReady
@param    {Player} player
          A Video.js player object.

@param    {Object} [options={}]
          A plain object containing options for the plugin.