v2.1.1

Refactor

• update Axis trait to include some methods so that the nearest_one methods can be identical between float and fixed.
• float and fixed both use a common macro for best_n_within
• float and fixed both use a common macro for within_unsorted
• float and fixed both use a common macro for within
• float and fixed both use a common macro for nearest_n

CI

• Update pre-release.yml to remove Clippy check
• Add CI for format/clippy/test/coverage/release/publish