0.3.1

• Update bundled xxhash C library to 0.8.3.
• A few critical bug fixes.

0.3

• Update bundled xxhash C library to 0.8.2.
• Add FFI bindings for XXH3 family of hash functions.
• Add newtype XXH3 and instance Hashable for it.
• Deprecate class XXHash, please use XXH3-based API instead.