message: update libsodium install to install version 1.0.12
diff: ```
  brew install pkg-config
  - brew install libsodium
  + brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/65effd2b617bade68a8a2c5b39e1c3089cc0e945/Formula/libsodium.rb
  brew install automake
  brew install autoconf
  brew install cmake
  