message: Minor: replace typedefs with using statements
diff: namespace Primal3D
  {
  -typedef axom::primal::Point<double, 3> PointType;
  -typedef axom::primal::Vector<double, 3> VectorType;
  -typedef axom::primal::BoundingBox<double, 3> BoundingBoxType;
  -typedef axom::primal::Triangle<double, 3> TriangleType;
  -typedef axom::primal::Tetrahedron<double, 3> TetrahedronType;
  -typedef axom::primal::Octahedron<double, 3> OctahedronType;
  -typedef axom::primal::Polyhedron<double, 3> PolyhedronType;
  -typedef axom::primal::Polygon<double, 3> PolygonType;
  +using PointType = axom::primal::Point<double, 3>;
  +using VectorType = axom::primal::Vector<double, 3>;
  +using BoundingBoxType = axom::primal::BoundingBox<double, 3>;
  +using TriangleType = axom::primal::Triangle<double, 3>;
  +using TetrahedronType = axom::primal::Tetrahedron<double, 3>;
  +using OctahedronType = axom::primal::Octahedron<double, 3>;
  +using PolyhedronType = axom::primal::Polyhedron<double, 3>;
  +using PolygonType = axom::primal::Polygon<double, 3>;
  using PlaneType = axom::primal::Plane<double, 3>;
  using PolyhedronType = axom::primal::Polyhedron<double, 3>;
  } // namespace Primal3D
  