Version 1.13.0

• Breaking changes on public methods:
  • renames poly1305 -> poly1305pair
  • renames poly1305auth -> poly1305
  • accepts 16 bytes key for poly1305
• Refactor Poly1305 class structure.
  Breaking changes:
  • renames Poly1305.auth -> Poly1305.pair
  • removes getter secret (key contains both keypair).
• Refactor benchmark calculation.

Full Changelog: v1.12.1...v1.13.0