Changelog for ppad-hmac-drbg-0.2.1

# Changelog - 0.2.1 (2026-01-10) * Simply adds bounds to the ppad-sha{256,512} dependencies in the test and benchmark suites. - 0.2.0 (2026-01-10) * In order to better-match the spec, 'gen' now returns an 'Either Error BS.ByteString'. The new 'Error' value is returned either in the exceptionally rare case that the DRBG needs a reseed (previously this was just "error <msg>"), or, more likely to occur in practice, if more than 65536 bytes are requested from the DRBG at a time. - 0.1.3 (2025-12-28) * Adds an 'llvm' build flag and tests with GHC 9.10.3. - 0.1.2 (2025-02-06) * Minor bytestring optimizations for shaving off microseconds in certain cases. - 0.1.1 (2024-10-07) * Add a basic placeholder 'Show' instance for the DRBG type. - 0.1.0 (2024-10-05) * Initial release.