Preview/dotnet6 (#65)
* misc tweaks
* upgrade to csharp 10 & .net 6
* nuget updates
* nugets updated
* .net 6 tests passing
* file-scoped namespaces implemented
* fix minor code smells
* add .net 6 to workflow
* fix warnings
* fix extension
* pragma disable IDE0060
* fix more warnings
* add static to method signature
* AsyncDuplicateLock methods made static
* skip IDE0042
* sectionkey to const
* ignore OperationCanceledException
* update gitversion for preview
* ignore auto builds on preview branch?
* disable sq
* fixup gv yml
* fix gv
* tidy
* +semver: minor
* fix
* SemVer->FullSemVer
* added PublishPreview
* added branchname
* fix-up LogError
* update to .net rc1
* nuget updates
* .net 6 rc2
* nuget update
* tidy
* fixes
* fixes
* Task.Delay CancellationToken.None
* nuget update
* final nuget updates
* fix
* pr fixes
* nuget update
* try sq w/.net 6
* nugets
* update ci
* re-run wf
* revert
* update readme
Co-authored-by: Azure DevOps CI <agent@dev.azure.com>
