[Fix] Fix a crash of turf-convex when the resulting hull has only 1 or 2 coordinates. (#431)
[Fix] Fix a crash of turf-convex when the resulting hull has only 1 or 2 coordinates. (#431)

It can happen for instance when the input feature collection contains only a point, the resulting hull has only one point, which makes the turf-polygon algorithm crash because it needs at least 3 different vertices.
hooplert/jesper,jvrousseau/turf,jvrousseau/turf,dpmcmlxxvi/turf,dpmcmlxxvi/turf,ath0mas/turf,tilemapjp/turf,tilemapjp/turf,stebogit/turf,stebogit/turf,Turfjs/turf,Turfjs/turf,hooplert/jesper,ath0mas/turf,stebogit/turf,tilemapjp/turf,dpmcmlxxvi/turf,jvrousseau/turf,hooplert/jesper,Turfjs/turf