suppressed some more warnings

include/catch.hpp

@@ -9,6 +9,12 @@
 #ifndef TWOBLUECUBES_CATCH_HPP_INCLUDED
 #define TWOBLUECUBES_CATCH_HPP_INCLUDED
 
+#ifdef __clang__
+#    pragma clang system_header
+#elif defined __GNUC__
+#    pragma GCC system_header
+#endif
+
 #include "internal/catch_suppress_warnings.h"
 
 #if defined(CATCH_CONFIG_MAIN) || defined(CATCH_CONFIG_RUNNER)