Intern identifiers in C parser by default

Author: rmosolgo

graphql-c_parser/ext/graphql_c_parser_ext/graphql_c_parser_ext.h

@@ -1,6 +1,7 @@
 #ifndef Graphql_ext_h
 #define Graphql_ext_h
 #include <ruby.h>
+#include <ruby/encoding.h>
 #include "lexer.h"
 #include "parser.h"
 void Init_graphql_c_parser_ext();