Upgrade packages

[Rob-Hague]

• Remove reference to Microsoft.CodeAnalysis.NetAnalyzers (use the stable version by default)
• Upgrade StyleCop.Analyzers to 1.2.0-beta.556 (fixes a collection expression whitespace issue - the motivation for this change)
• Upgrade SonarAnalyzer.CSharp to 9.16.0.82469 (the release notes have some performance improvements 👍)
• Upgrade Microsoft.Bcl.AsyncInterfaces to 8.0.0 while we are here.

I did not upgrade Meziantou.Analyzer because the release notes show some new analyzers so it probably needs more attention there.