Parse key values as leaf_data

Change-Id: Ib70a47dd4bcea0426d3b2063a845d4ce075d81f4
diff --git a/src/ast_commands.hpp b/src/ast_commands.hpp
index c5ffb61..7f3160a 100644
--- a/src/ast_commands.hpp
+++ b/src/ast_commands.hpp
@@ -14,7 +14,7 @@
 
 namespace x3 = boost::spirit::x3;
 
-using keyValue_ = std::pair<std::string, std::string>;
+using keyValue_ = std::pair<std::string, leaf_data_>;
 
 enum class LsOption {
     Recursive