PowerShell v6.0.1 is available from https://github.com/PowerShell/PowerShell/releases
This release upgrades PowerShell to use .NET core v2.0.5 which addresses a couple of security vulnerabilities. The release also addresses upgrade issues on some Linux distributions due to version numbers being misunderstood.
Also available is the v1.0.0 beta for OpenSSH https://github.com/PowerShell/Win32-OpenSSH/releases. This version supplies one of my wishes for 2018 in that the installation and configuration is much simpler
under: PowerShell v6