FSharp.Data.GraphQL.Server 2.2.1 requires FSharp.Control.Reactive >= 5.0.5 and System.Reactive >= 6.0.1
However, the latest FSharp.Control.Reactive is 5.0.5 and that requires System.Reactive >= 5.0.0 && < 6.0.0
So is the latest version impossible to install?