This project is not being maintained. It is very likely that issues will not be fixed. Feel free to make a fork or just use the codebase for your own tasks. QuickJS (© Fabrice Bellard and Charlie ...
This proposal is complete and already merged into ECMA262 specification. See the specification text here. Thanks for help and feedback on this effort from Brendan Eich, Waldemar Horwat, Jaro Sevcik, ...