Part: modernize C++: replace 'typedef' with 'using'

src/Mod/Part/App/TopoShapePyImp.cpp

@@ -2473,7 +2473,7 @@ PyObject* _getSupportIndex(const char* suppStr, TopoShape* ts, TopoDS_Shape supp
 
 PyObject* TopoShapePy::proximity(PyObject *args)
 {
-    typedef BRepExtrema_MapOfIntegerPackedMapOfInteger BRepExtrema_OverlappedSubShapes;
+    using BRepExtrema_OverlappedSubShapes = BRepExtrema_MapOfIntegerPackedMapOfInteger;
 
     PyObject* ps2;
     Standard_Real tol = Precision::Confusion();