increase unit test timeout
increase unit test timeout

nessos/FsPickler,mbraceproject/FsPickler,haraldsteinlechner/FsPickler,FsUnity/Unity3d.FsPickler,cloudRoutine/Unity3d.FsPickler,haraldsteinlechner/FsPickler,wallymathieu/FsPickler,nessos/FsPickler,cloudRoutine/Unity3d.FsPickler,wallymathieu/FsPickler,FsUnity/Unity3d.FsPickler