main
Add IsNull property to IAsyncToken (#78718)
Make CancellationToken optional for AsyncBatchingWorkQueue
Also dispose the underlying CancellationSeries
Source package fixes (#78534)
Avoid adding dependency on System.Threading.Channels to InteractiveHost (#79594)
Remove obsolete CS1998 suppressions (#84216)
Move RoslynParallel and ProducerConsumer to threading source package (#79474)
Use globs in .projitems for source packages (#79480)
Move async utils to Microsoft.CodeAnalysis.Threading source package (#76937)
Address more analyzer violations