v0.2.1

• Make code more bulletproof in the case of panics when using the decode_buf or encode_config_buf functions.
• Additionally, several functions that previously used unsafe internally now either use less unsafe, or are entirely safe.

0.2.0

• encode_byte now returns [u8; 2] instead of (u8, u8), as in practice this tends to be more convenient.
• The use of std which requires the alloc trait has been split into the alloc feature.
• base16 has been relicensed as CC0-1.0 from dual MIT/Apache-2.0.