v0.0.2

• Changed bip32_serialze str_len to a pointer which returns the final length of the base58-encoded out string.
• Added some precautionary sodium_memzero() calls.
• Made bip32_b58_encode() and bip32_b58_decode() a public part of the API.

v0.0.1

Merge pull request #2 from jamesob/jamesob-25-03-impl-change

refine the `bip32_derive` interface