Hotfix 10 coordinates with 3 elements cause error

[johachi]

As mentioned in PR #10, according to RFC 7946

A position is an array of numbers.  There MUST be two or more elements.

and

Implementations SHOULD NOT extend positions beyond three elements.

In response to above This PR does the following:

• Make sure that center coordinates with two or three element is accepted.
• Update test to test above.
• Bump the version to 2.0.1.

The PR DOES NOT

• change circleToPolygon's it's output even if there is an extra third element.
• change circleToPolygon to accept more than three elements.

This closes #10

@gabzim , @drtyh2o Since the specification does technically allow it, would it be a better solution to change validation test of the center coordinate to accept any array as long as the two first elements are valid lng and lat coordinates?

[mdurling]

I think accepting any array of at least 2 numbers would be reasonable since lng, lat are the only arguments required by this function.

[johachi]

Looks good to me.

Thanks! I will wait for @gabzim and hope he will accept the PR soon.

[gabzim]

👍 thanks @johachi , was not aware that you could have a third element either @drtyh2o, merging