3.0.0

Changed

• ⚠️ This version is only compatible with Argon2
  20160406
  and later.
• ⚠️ Renamed the encrypt() function to hash_encoded(), in order to
  carry a stronger meaning and to eventually implement a hash_raw() function
  in the future.
• New variants field with supported Argon2 encoding variants (as userdatum).
  See documentation and the "Added" section of this Changelog.
• Updated the default hashing options to match those of the Argon2 CLI:
  t_cost = 3, m_cost = 4096, parallelism = 1, hash_len = 32.

Added

• 🌠 Support for Argon2id encoding variant.
  #24
• We now automatically compute the length of the retrieved encoded hash from
  encrypt(). #21
• New option: hash_len.
  #22
• Return errors from verify(). A mismatch now returns false, nil, while an
  error will return nil, "err string".
  #23
• ANSI C compatibility.
  #27