GeoJSON definition with OpenAPI Specification v3.0
This document defines the GeoJSON format as an OpenAPI v3.
It contains the definitions for 'Feature' object and 'FeatureCollection'
objects, as well as the definitions for all 'Geometry' objects.
It conforms with the 'RFC-7946' standard from IETF (August 2016 version)
https://tools.ietf.org/html/rfc7946
Kudos to @bubbobne and @idkw whose code helped me not start from scratch
https://gist.github.com/bubbobne/fe5f2db65acf039be6a9fd92fc9c7233