It's best just to keep an eye on the ChangeLog. New functionality usually gets reported in there: https://github.com/espruino/Espruino/blob/master/ChangeLog
If you want to be 'pushed' when stuff happens you can always subscribe to the Espruino repo and then you'll see when anything gets added
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
It's best just to keep an eye on the ChangeLog. New functionality usually gets reported in there: https://github.com/espruino/Espruino/blob/master/ChangeLog
If you want to be 'pushed' when stuff happens you can always subscribe to the Espruino repo and then you'll see when anything gets added