1.3.0

Adds a pretty option to JSON_SaveFile (Thanks @xunder-matth!!!)
Adds JSON_GetType to get the data type of a key in a JSON node.
Adds JSON_Keys to iterate through a JSON node and fetch its keys.

native JSON_SaveFile(const path[], Node:input, bool:pretty = false);
native JSON_NODE:JSON_GetType(Node:node, const key[]);
native JSON_Keys(Node:node, index, output[], len = sizeof(output));