Run Clang-tidy with modernize-use-auto (#1077)

* Run clang-tidy modify with modernize-use-auto
* Use using instead of typedef

src/lib_json/json_tool.h

@@ -71,7 +71,7 @@ enum {
 };
 
 // Defines a char buffer for use with uintToString().
-typedef char UIntToStringBuffer[uintToStringBufferSize];
+using UIntToStringBuffer = char[uintToStringBufferSize];
 
 /** Converts an unsigned integer to string.
  * @param value Unsigned integer to convert to string