* Update all dependencies and deal with warning/errors

* Add updated AsyncEnumerable implementation

* Fix broken target

* Cleanup

* Remove obsolete message

* typo

* Update azure pipelines

* Update samples to .NET Core 3.0

* Pull out test change

* Install the .net core 3 SDK on the ubuntu image for the time being

* Target net core 3 for the unit tests because pipelines

* Start on API analyzers

* Finish GuildAccessAnalyzer

* Update build script (will this do?)

* Correct slashes

* Extrapolate DerivesFromModuleBase() to an extension method

* Quick refactoring

* Add doc file