add cstdint include

GCC 13 adjusts the include structure such that cstdint does not end up
being included by default in many cases.  Add the include whenever the
`uint*` class types are used to prevent a compile failure.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0bb3dda5fe96db2109507500dfad29c3269454f7
diff --git a/names_values.hpp b/names_values.hpp
index 962c65d..9c2756a 100644
--- a/names_values.hpp
+++ b/names_values.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include <cstdint>
 #include <sstream>
 #include <string>