vb : vbyte encode / decode

→ tests/main.rs

```rust

[test]

fn main() { let vbe = vb::e([254, 1, 3]); dbg!(&vbe); dbg!(vb::d(vbe).unwrap()); } ```

run

→ out.txt

txt + cargo test --all-features -- --nocapture Running tests/main.rs (target/debug/deps/main-65c7e4de979d0b09) [tests/main.rs:4] &vbe = [ 254, 1, 1, 3, ] [tests/main.rs:5] vb::d(vbe).unwrap() = [ 254, 1, 3, ]