//! # SLH-DSA (SPHINCS+)
//!
//! ## Variants
//!
//! s: small sigs, slow verifying
//! f: fast verifying, larger sigs
//!
//! - SLH-DSA (Level 5) using SHAKE256s
//! - SLH-DSA (Level 5) using SHA2_256s
//!
//! - SLH-DSA (Level 3) using SHAKE256s
//! - SLH-DSA (Level 3) using SHA2_256s
//!
//! ## TODO:
//!
//! - [ ] Add support for SLH-DSA (Level 5) using SHAKE256s
/// SLH-DSA (Level 5) using SHAKE256s