0.2.0

version 0.2.0

Changes since 0.1.8:

• Rename the "context" keyword argument to "derive_key_context" for
  clarity.
• Upgrade PyO3 to 0.14, which raises the minimum supported Python
  version to 3.6.
• The blake3.OUT_LEN and blake3.KEY_LEN module constants have been
  replaced with "digest_size" and "key_size" attributes on the hasher
  object itself. This is more consistent with how the standard hashlib
  module behaves. A "block_size" attribute has also been added.
• Add the blake3.__version__ module constant.
• Add the "neon" Cargo feature, which maps to the "neon" feature of the
  underlying blake3 crate.