Disable parallel testing for xUnit (see #27)

Author: abelbraaksma

src/FSharpy.TaskSeq.Test/AssemblyInfo.fs

@@ -2,7 +2,7 @@ namespace FSharpy.Tests
 
 open System.Runtime.CompilerServices
 
-[<assembly: Xunit.CollectionBehavior(DisableTestParallelization = false)>]
+[<assembly: Xunit.CollectionBehavior(DisableTestParallelization = true)>]
 [<assembly: Xunit.TestCaseOrderer("FSharpy.Tests.AlphabeticalOrderer", "FSharpy.TaskSeq.Test")>]
 
 do ()