Fix dependabot issues by upgrading newtonsoft json library to 13.0.1

[JamesWTruher]

PR Summary

dependabot recommended upgrade to our newtonsoft library

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 .cs, .ps1 and .psm1 files have the correct copyright header
• Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
• 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.

[bergmeister]

@JamesWTruher I think we should revert this. We've always ignored them because we should not use a version higher than the one of the oldest used PowerShell 'Core' version (which in this case is PS 7.0) because if someone was to use and load PSSA first, the behavior of that PowerShell instance will be different (and likely more breaking) as PowerShell Core cannot unload assemblies once they are already loaded.
https://github.com/PowerShell/PSScriptAnalyzer/pulls?q=is%3Apr+bump+newtonsoft+is%3Aclosed+