Use OCCT Handle macro for Handle_ classes

This is the result of running OCCT's upgrade script provided
with OCCT 7.0. See
https://www.opencascade.com/content/freecad-occt710-and-windows-rtti-data-missing#comment-form
and
https://www.forum.freecadweb.org/viewtopic.php?f=4&t=21405&start=120#p169019
for why this is necessary for OCCT >= 7.1

src/Mod/TechDraw/App/GeometryObject.cpp

@@ -154,7 +154,7 @@ void GeometryObject::projectShape(const TopoDS_Shape& input,
 
     auto start = chrono::high_resolution_clock::now();
 
-    Handle_HLRBRep_Algo brep_hlr = NULL;
+    Handle(HLRBRep_Algo) brep_hlr = NULL;
     try {
         brep_hlr = new HLRBRep_Algo();
         brep_hlr->Add(input, m_isoCount);