PowerShell Core v6.2.1 has been released – https://github.com/PowerShell/PowerShell/releases
as has v6.1.4
The new versions are to primarily fix the Security Vulnerability CVE-2019-0733 – https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0733
v6.2.1 also enables tab completion for functions
under: PowerShell v6