message: Make sure ci is running in powershell version 6
  $PSVersionTable does not have an os entry in powershell version 5. This
  will cause ci.ps1 to break in unknown ways.
diff: @@ -12,6 +12,10 @@ param(
  )
  $ErrorActionPreference = "Stop"
  +if ($PSVersionTable.PSVersion.Major -lt 6) {
  + Write-Error -Message "This script requires at least powershell 6"
  +}
  +
  $CMakeToolsVersion = "0.11.0"
  # Import the utility modules
  