* Make Ix homoiconicity generator nullable-aware
* Upgrade ApiCompare and Playground to .NET 8.0
* Fix diagnostics
* Removed old NO_ARRAY_EMPTY conditional sections as no build targets now set that
* Add .NET 8.0 targets for test projects
* Add readme explaining use of .NET Core 3.1 in tests
* Remove use of MSBuild.Sdk.Extras and step to build refs explicitly
* Replace erroneous net4.8 TFM with net48 in reference assemblies
* Copy .editorconfig from https://github.com/dotnet/corefx/blob/master/.editorconfig, delete the overriding .editorconfig in Rx.NET.
* Deviations for this repo.
* Use pascal case for static fields, without s_ prefix.
* Omit default accessibility modifiers.
* Prefer inferred names.
* Add indent_size = 2 for yaml files.
Ian Griffiths
Bart De Smet
Oren Novotny
David Karnok
Daniel C. Weber