[ANN] RbNaCl 4.0.0: a modern cryptography for Ruby, now with ChaCha20Poly1305 and Argon2 support

RbNaCl is a Ruby FFI binding to NaCl/libsodium, one of the best modern
cryptography libraries available:

https://github.com/cryptosphere/ <https://github.com/cryptosphere/rbnacl>
rbnacl <https://github.com/cryptosphere/rbnacl>

<https://github.com/cryptosphere/rbnacl>Version 4 includes support for two
new algorithms:

   - *ChaCha20Poly1305*: a modern authenticated (AEAD) symmetric encryption
   cipher with great performance on a wide variety of platforms.
   - *Argon2*: winner of the Password Hashing Competition (PHC), a modern
   password hashing function

Note this release drops support for Ruby versions prior to 2.2.6. If you
need support for older Rubies, please continue using RbNaCl 3.x.

···

--
Tony Arcieri