What about JSON5 style for JSON5.stringify() in Espruino?

JSON

var json = {a:1,b:2};   
var data = JSON.stringify(json);  // '{"a":1,"b":2}'

JSON5

var json = {a:1,b:2};
var data = JSON5.stringify(s);     // "'{a:1,b:2}'"

Possible workaround to convert standard JSON to JSON5 for .stringify()

var json = {a:1,b:2}; 
var data = JSON.stringify(json).replace(/\"/g, '');  // '{a:1,b:2}'

But how to convert a JSON5 data string back to a json object in Espruino?