Create 4.6.0.md
Create 4.6.0.md

@rowanwins @stebogit Feel free to help me populate this release note, it takes forever to look back at all the issues and figure out what happened.

v4.6.0 Issues
https://github.com/Turfjs/turf/milestone/10?closed=1

Last release
https://github.com/Turfjs/turf/issues/826
Turfjs/turf,hooplert/jesper,hooplert/jesper,tilemapjp/turf,tilemapjp/turf,dpmcmlxxvi/turf,Turfjs/turf,Turfjs/turf,dpmcmlxxvi/turf,dpmcmlxxvi/turf,tilemapjp/turf,hooplert/jesper