tmp commit: register scattermapbox in main index file,

- this commit will be remove before the first release as
  some mapbox cannot be tested on CircleCI yet.

Author: etpinard

lib/index.js

@@ -30,7 +30,9 @@ Core.register([
     require('./scattergeo'),
     require('./choropleth'),
     require('./scattergl'),
-    require('./scatterternary')
+    require('./scatterternary'),
+
+    require('../src/traces/scattermapbox')
 ]);
 
 module.exports = Core;