COMP: does not compile with paraview 5.5.2 (fixes #8)

- need to explicitly include vtkPVConfig.h to get the version macros

src/catalyst/catalystTools.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2018-2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -25,6 +25,7 @@ License
 #include "catalystTools.H"
 #include "Time.H"
 
+#include <vtkPVConfig.h>
 #include <vtkCPDataDescription.h>
 #include <vtkCPInputDataDescription.h>
 #include <vtkCPProcessor.h>