Bump to v3.7.4

Bump to 3.7.3.

Update H3 to 3.7.2 (#72)

* Update H3 to 3.7.2
* Bye bye Travis, hello GitHub Actions.

Update H3 to 3.7.1 & add new functions (#70)

Upgrade to v3.6.4

Update CHANGELOG.md

Upgrade to v3.6.1 (#63)

Release v3.6.0 (#62)

### Added
- `center_child` method to find center child at given resolution (#62).
- `pentagons` (and `pentagon_count`) method to find pentagons at given resolution (#62).

Release v3.5.1 (#61)

Support for h3 3.5.0 (#56)

* Update h3 to 3.5.0

Includes new `h3_faces` and `h3_max_count` methods.

Behind the scenes, `cmake` is given a couple of extra build options
to prevent it from building unnecessary filter binaries and benchmarks.

* Update CHANGELOG.md

Co-Authored-By: Xavier Noria <fxn@hashref.com>

* Update lib/h3/inspection.rb

Co-Authored-By: Xavier Noria <fxn@hashref.com>