message: Moved _USE_MATH_DEFINES first for _WIN32
diff: // terms of the GNU Lesser General Public License (as published by the Free
  // Software Foundation) version 2.1 dated February 1999.
  -#include "catch.hpp"
  -#include <unordered_map>
  -
  #ifdef _WIN32
  #define _USE_MATH_DEFINES
  #include <cmath>
  #endif
  +#include "catch.hpp"
  +#include <unordered_map>
  +
  #include "mfem.hpp"
  #include "general/forall.hpp"
  