Update CONTRIBUTING.md
Update CONTRIBUTING.md

Update with current discussion status.
Turfjs/turf,dpmcmlxxvi/turf,tilemapjp/turf,dpmcmlxxvi/turf,Turfjs/turf,tilemapjp/turf,tilemapjp/turf,dpmcmlxxvi/turf,Turfjs/turf