v0.2.0

Removed

• NewV3 and V3 version constant — V3 (MD5) is superseded by V5 (SHA-1) per RFC 9562

Changed

• hash.Cloner optimization now only covers SHA-1 (V5), MD5 removed
• .golangci.yml gosec exclusions narrowed to G505 only (SHA-1)

Full Changelog: v0.1.1...v0.2.0