Changelog for ppad-aead-0.3.0

# Changelog - 0.3.0 (2025-12-27) * Updates the poly1305 dependency to a version that uses ppad-fixed for fixed-width words and constant-time primitives internally. Also swaps a naïve ByteString equality check out for a constant-time version. - 0.2.0 (2025-06-21) * The 'encrypt' and 'decrypt' functions are now total, returning 'Left InvalidKey', 'Left InvalidNonce', or 'Left InvalidMAC' values when passed the corresponding bad inputs. - 0.1.0 (2025-03-09) * Initial release, supporting the ChaCha20-Poly1305 configuration.