I want to use the new powershell 6 rather than the default powershell, so it will be perfect if BuiltinCmd support powershell 6 or just allow user to set path manually.
Me too, best practices should indicate that the plugin should be configurable. As a validation, you can always check that the path ends in cmd.exe or powershell.exe.
I want to use the new powershell 6 rather than the default powershell, so it will be perfect if BuiltinCmd support powershell 6 or just allow user to set path manually.