Antimeridian option for Center of Mass (suggestion)

A quick suggestion related to center of mass calculations when a feature crosses the antimeridian.

Here's the problem:

You have a small island in the Pacific Ocean, and the center of mass is the average of +179.5° in the west and -179.5° in the east. The calculation, without a doubt, yields 0°, i.e. close to London.

This can be solved be translating the polygon back and forth on the map, or by making the barycenter calculations using coordinates between 0° and 360°, and going back to [-180,+180] afterwards.

In the previous example, you then would get the average of 179.5 and 180.5, which is 180°, indeed in the Pacific Ocean!

It could be very nice to provide this option in the centerOfMass function (something like { antimeridian: true }).

Thanks for all the good work at Turf, and good luck to the team!

Start at the centerOfMass function and review how it currently averages longitudes, then locate its existing tests if available. Done means the function supports an antimeridian option and returns a center near 180° for a feature spanning ±180°, without changing the default behavior.