Add plotly_subnburstclick event

Author: MikeRippon

README.md

@@ -174,6 +174,7 @@ Event handlers for specific [`plotly.js` events](https://plot.ly/javascript/plot
 | `onSliderChange`          | `Function` | `plotly_sliderchange`          |
 | `onSliderEnd`             | `Function` | `plotly_sliderend`             |
 | `onSliderStart`           | `Function` | `plotly_sliderstart`           |
+| `onSunburstClick`         | `Function` | `plotly_sunburstclick`         |
 | `onTransitioning`         | `Function` | `plotly_transitioning`         |
 | `onTransitionInterrupted` | `Function` | `plotly_transitioninterrupted` |
 | `onUnhover`               | `Function` | `plotly_unhover`               |

src/factory.js

@@ -30,6 +30,7 @@ const eventNames = [
   'SliderChange',
   'SliderEnd',
   'SliderStart',
+  'SunburstClick',
   'Transitioning',
   'TransitionInterrupted',
   'Unhover',