H3

- Wheels for Linux Aarch64 (189)

- Add vectorized h3_to_parent and h3_get_resolution (166)

- fix for 169: `h3_distance` error reporting (175)
- build Python 3.9 wheel for Mac (175)
- bump h3lib version to v3.7.1 (175)

- Add functions (171)
+ `cell_area`
+ `exact_edge_length`
+ `point_dist`

- Add `requirements.in` for `pip-compile` usage (157)
- Update `h3-c` to v3.6.4 (157)
- Add functions:
+ `experimental_local_ij_to_h3` (155)
+ `experimental_h3_to_local_ij` (155)
+ `h3.unstable.vect.cell_haversine` (147)
+ `h3.unstable.vect.geo_to_h3` (147)
+ Prototype v4 names under `h3.unstable.v4` (146)

- Add functions:
+ `get_res0_indexes`
+ `h3_to_center_child`
+ `h3_get_faces`