Include nlohmann before PDAL.

Author: abellgithub

src/pdal/filters/PythonFilter.cpp

@@ -32,10 +32,10 @@
 * OF SUCH DAMAGE.
 ****************************************************************************/
 
-#include "PythonFilter.hpp"
-
 #include "../nlohmann/json.hpp"
 
+#include "PythonFilter.hpp"
+
 #include <pdal/PointView.hpp>
 #include <pdal/DimUtil.hpp>
 #include <pdal/util/ProgramArgs.hpp>