Breaking changes.

• MSRV has been set to Rust1.66.

Changes

• Updatedbase32 crate to0.5.
• Updatedconstant_time_eq crate to0.3.
• Updatedrand crate to0.9.
• Added a bit of documentation.

Note

This is probably the last version update before the big6.0, which will be a big rewrite, and the2024 edition.
The goal will be to expose the same feature as before, but in a more harmonized and idiomatic way.