argon2 format

[anarcat]

The vaultwarden server expects hashes to be passed as argon2 which look something like this:

$argon2id$v=19$m=19456,t=2,p=1$cXpKdUxHSWhlaUs1QVVsSStkbTRPQVFPSmdpamFCMHdvYjVkWTVKaDdpYz0$E1UgBKjUCD2Roy0jdHAJvXihugpG+N9WcAaR8P6Qn/8

It would be nice to have trocla support those as well! :)

(Similar to the yescrypt request in #81...)

[duritong]

Happty to take PRs

[duritong]

This could be a feasible gem to be used for this: https://github.com/technion/ruby-argon2