message: Use dist instead of src in mapbox
  I had issues compiling the src, I think it's because the syntax is different than the one used here?
  With the dist it works fine.
  I also saw there were other related issues in the past, so I'm suggesting to switch to the dist file.
diff: @@ -4,7 +4,7 @@ import d3 from 'd3';
  import React from 'react';
  import ReactDOM from 'react-dom';
  import MapGL from 'react-map-gl';
  -import ScatterPlotOverlay from 'react-map-gl/src/overlays/scatterplot.react.js';
  +import ScatterPlotOverlay from 'react-map-gl/dist/overlays/scatterplot.react.js';
  import Immutable from 'immutable';
  import supercluster from 'supercluster';
  import ViewportMercator from 'viewport-mercator-project';
  