Update with maritime territorial boundaries.

[leeprevost]

I believe most countries recognize 12 and 24 nm boundaries.

How could we approach something like is-open-sea(lat,Lon,boundary =12)?

When I use your demo, this currently shows True even when inside territorial waters such as US intracoastal waterway.

https://en.wikipedia.org/wiki/Territorial_waters

[leeprevost]

See my attempt at this with pr #11

[leeprevost]

Not familiar with ava so not able to run test script but manual testing completed and PR ready