Prepare for the 2.2.0-beta2 release

[daxian-dbw]

PR Summary

Prepare for the 2.2.0-beta2 release.

• Update version and change log
• Use newer version of a couple NuGet packages
• Alter the Get-ChangeLog script from PowerShell repo to make it work for PSReadlLine release.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure you've added one or more new tests
• Make sure you've tested these changes in terminals that PowerShell is commonly used in (i.e. conhost.exe, Windows Terminal, Visual Studio Code Integrated Terminal, etc.)
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed at PowerShell-Docs
    • Doc Issue filed: