development

"covers" containment mode is now supported
to_cells() is renamed sfc_to_cells()
h3o dependency is bumped to version 0.4.0
sfc_to_cells() gets a new argument containment based off of the ContainmentMode enum

h3o 0.2.0

Adds a wk::wk_handler function for conversion to sfc, geos, s2, and other types that implement the handler.
New functionality: to_cells() to convert an sfc object to H3 cells.
Refactors Rust code to avoid collecting into Lists to prevent Stack Overflow bug.
Bumps h3o version to 0.3.5 to get speed and memory enhancements.