fix timer resolution

lib/ghobs.js

@@ -52,12 +52,14 @@ function GHOBS(config) {
 
 	    		// resolve Promise with a timer of when the video will finish playback
 	    		// trigger user callback when the video finishes
-	      	resolve(setTimeout(() => {
+	    		let timer = setTimeout(() => {
 	      		this.websocket.setSceneItemProperties({"item": video.sceneItem, "visible": false});
 	      		if (typeof callback !== 'undefined') {
 	        		callback();
 	        	}
-	      	}, parseInt(video.length*1000)))
+	      	}, parseInt(video.length*1000));
+
+	      	resolve(timer);
 	      })
 	      .catch(reject);
 		});
@@ -79,7 +81,7 @@ function GHOBS(config) {
 
     	this.websocket.setCurrentScene({"scene-name": scene})
         .then(() => this.playVideo(video, handleVideoEnd))
-        .then(timer => resolve)
+        .then(timer => { resolve(timer) })
         .catch(reject);
     });
   };