Changelog for ppad-script-0.2.1

# Changelog - 0.2.1 (2025-01-21) * Minor Haddock improvements. - 0.2.0 (2025-01-20) * Renames the older-style 'OP_PUSHNUM_N' opcodes to the newer 'OP_N', and similarly 'OP_PUSHNUM_NEG1' to 'OP_1NEGATE'. - 0.1.0 (2025-01-19) * Initial release supporting basic representations of Script, as well as utility functions for converting between them.