PR Summary

Binary module authors have been neglected, and some data that is easily accessible in PowerShell has not been exposed via public interfaces to binary module authors. I've used reflection in many cases to work around these interface shortcomings since before PowerShell became open source, and I'd like to work away from that and start making these highly important pieces of PowerShell data public so that reflection isn't needed moving forward.

This PR simply makes the static PSVersionInfo.PSVersion and PSVersionInfo.PSEdition properties public so that binary module authors building against PowerShell Core can make runtime decisions based on the version and edition as required without having to invoke PowerShell to retrieve $PSVersionTable and without having to use reflection.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: to the beginning of the title and remove the prefix when the PR is ready.
• User-facing changes
  • Not Applicable
  • OR
  • User-facing Documentation needed
    • Issue filed - Issue link: MicrosoftDocs/PowerShell-Docs#3127
• Testing - New and feature
  • Not Applicable or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed
    • Add [feature] if the change is significant or affects feature tests