Update SSH client to support EC 25519

[peepsmn]

The Myrtile.SSH client is built using SSH.Net 2016.1.0, which did not support Curve25519, which is all the rage these days, especially on RHEL 8/RHEL9 environments. SSH.Net 2020.2.0 does support it and can easily be added in without adverse effects. I couldn't get a build of everything that I was able to push back to the repo, but recompiling Myrtille.Ssh -> packages.config for SSH.NET to version 2020.0.2 and compiling, then moving over Myrtille.SSH.exe, Myrtille.SSH.exe.config, and Renci.SshNet.dll, I was able to connect to my RHEL 9 instances where before I was not able to, and the Curve25519 has been a consistent issue with older SSH clients and these new images for my users. I know the current release is a couple of years old, but for the next release, this needs to be updated as newer 'nix OSes are switching to this for heightened security

[cedrozor]

Thanks for the information, it's noted for the next release.

[mulebm]

hello, thanks for the update - is there any ETA on the next release?