add nowtime in Timeline class

SijieCai · SijieCai · commit 3282f27d25bd · 2018-09-03T20:33:52.000+08:00
diff --git a/src/index.js b/src/index.js
@@ -347,6 +347,6 @@ class Timeline {
     return id;
   }
 }
-
+Timeline.nowtime = nowtime;
 export default Timeline;
-export {nowtime};
+
