Best to use the bug tracker for requests like this: https://github.com/espruino/Espruino
However ESP8266 uses a software I2C implementation, so it should be possible to change it if you wanted.
@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.
Best to use the bug tracker for requests like this: https://github.com/espruino/Espruino
However ESP8266 uses a software I2C implementation, so it should be possible to change it if you wanted.