Bump version to 1.9.9

Author: forki

src/FSharpx.Async/AssemblyInfo.fs

@@ -4,9 +4,9 @@ open System.Reflection
 [<assembly: AssemblyTitleAttribute("FSharpx.Async")>]
 [<assembly: AssemblyProductAttribute("FSharpx.Async")>]
 [<assembly: AssemblyDescriptionAttribute("Async extensions for F#")>]
-[<assembly: AssemblyVersionAttribute("1.9.8")>]
-[<assembly: AssemblyFileVersionAttribute("1.9.8")>]
+[<assembly: AssemblyVersionAttribute("1.9.9")>]
+[<assembly: AssemblyFileVersionAttribute("1.9.9")>]
 do ()
 
 module internal AssemblyVersionInformation =
-    let [<Literal>] Version = "1.9.8"
+    let [<Literal>] Version = "1.9.9"