Please provide the following when reporting an issue: - [ ] The version of Turf you are using, and any other relevant versions. - [ ] GeoJSON data as a [gist file](https://gist.github.com/) or [geojson.io](http://geojson.io/) (filename extension must be `.geojson`). - [ ] Snippet of source code or for complex examples use [jsfiddle](https://jsfiddle.net/). - [ ] Verify this issue hasn't already been reported, or resolved in the latest alpha pre-release. <!-- Love turf? Please consider supporting our collective: 👉 https://opencollective.com/turf/donate -->