Using EventEmitter emit method to dispatch volume update event

Author: pavle-goloskokovic

src/sound/html5/HTML5AudioSoundManager.js

@@ -124,7 +124,7 @@ Object.defineProperty(HTML5AudioSoundManager.prototype, 'volume', {
         this.forEachActiveSound(function (sound) {
             sound.setVolume();
         });
-        this.events.dispatch(new SoundValueEvent(this, 'SOUND_VOLUME', value));
+        this.emit('volume', this, value);
     }
 });
 module.exports = HTML5AudioSoundManager;