Changed all .hpp extensions to .h where there is now a corresponding .cpp
diff --git a/include/catch.hpp b/include/catch.hpp
index 6132140..118337c 100644
--- a/include/catch.hpp
+++ b/include/catch.hpp
@@ -35,12 +35,12 @@
#endif
#include "internal/catch_tag_alias_autoregistrar.h"
-#include "internal/catch_test_registry.hpp"
+#include "internal/catch_test_registry.h"
#include "internal/catch_capture.hpp"
#include "internal/catch_section.h"
#include "internal/catch_benchmark.h"
#include "internal/catch_interfaces_exception.h"
-#include "internal/catch_approx.hpp"
+#include "internal/catch_approx.h"
#include "internal/catch_compiler_capabilities.h"
#include "internal/catch_string_manip.h"