@turf/centroid does not take the earth curvature into account

[hadbn]

The implementation of @turf/centroid is not taking the earth curvature into account.

Thus, the result is wrong when calculating the centroid of "big" polygons, or at high altitudes.

Reproduced with Turf version 7.1 running at https://turf-sandbox.netlify.app/ with the following code :

const p = turf.point([-30., 50.]);
const circ = turf.circle(p, 4000)
const p2 = turf.centroid(circ)

return turf.featureCollection([p,p2]);

[caelum29]

because the earth is flat )