Use geo_types macros to future proof

[nyurik]

Use coord! macro instead of geo_types::Coordinate<T> { x, y }. Doing this makes coordinate creation consistent, and allows more flexibility in the geo_types repo to introduce object changes.

• [ ] I agree to follow the project's code of conduct.

• [ ] I added an entry to CHANGES.md if knowledge of this change could be valuable to users.

[michaelkirk]

bors r+

[michaelkirk]

bors r+

not sure why the previous one didn't seem to take...

[bors[bot]]

Build succeeded:

• wkt