Repo moved to https://codeberg.org/worm-blossom/compact_u64
A machine-friendly varint, implemented in Rust.
See the [crate docs](https://docs.rs/compact_u64/latest/compact_u64/) for more
information, or read the
[more detailed specification here](https://willowprotocol.org/specs/encodings/index.html#compact_integers).