sourceCaches has been renamed in mapbox-gl #343
Description
Describe the bug
As of ~12 months ago sourcesCache in the map style has been renamed into three different variables: https://github.com/mapbox/mapbox-gl-js/blob/36533f3683dd48837ab07095fb6484165d9ee400/src/style/style.js#L139. This means any call which hits _updateTileSource in Source will cause a whitescreen because it tries to lookup a value in the sources cache - https://github.com/urbica/react-map-gl/blob/master/src/components/Source/index.js#L166.