cpp: fix windows build

also define NOMINMAX in convrt.hpp

Author: Totto16

src/cpp/convert.hpp

@@ -2,6 +2,12 @@
 
 #pragma once
 
+#ifdef _WIN32
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#endif
+
 #if defined(__GNUC__) & !defined(__clang__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wtemplate-id-cdtor"