add GeoJSON feature 'properties' to eventData

Author: etpinard

src/traces/choropleth/event_data.js

@@ -6,12 +6,16 @@
 * LICENSE file in the root directory of this source tree.
 */
 
-
 'use strict';
 
-module.exports = function eventData(out, pt) {
+module.exports = function eventData(out, pt, trace, cd, pointNumber) {
     out.location = pt.location;
     out.z = pt.z;
 
+    var cdi = cd[pointNumber];
+    if(cdi.fIn) {
+        out.properties = cdi.fIn.properties;
+    }
+
     return out;
 };