Adds the following features:
* KML format is now supported via the FastKML library
* Adds a `parsers` module with parsers for GeoJSON, WKT, and KML
* Adds a method `filter_impossible_journeys` to the `Track` object
* Coordinate order can now be flipped to return `(lat, lon)` in the various egress methods using the `reverse=True` keyword argument
* Adds a method `from_str` to the `TimeInterval` object to support string conversion
Updates the following:
* Upgrades H3 integration to version 4, from version 3
Fixes the following issues:
* Fixes a bug that occurred while parsing Z values from WKT
* Fixes a bug that occurred when attempting to pickle any geostructure