Merge pull request open-source-parsers#536 from vriera/master

resolves open-source-parsers#537
closes open-source-parsers#538

Author: cdunn2001

include/json/config.h

@@ -7,6 +7,7 @@
 #define JSON_CONFIG_H_INCLUDED
 #include <stddef.h>
 #include <string> //typdef String
+#include <stdint.h> //typedef int64_t, uint64_t
 
 /// If defined, indicates that json library is embedded in CppTL library.
 //# define JSON_IN_CPPTL 1