Hi Stef,
Try implementing note 2075016 SAPUI5 Applications: No need to clear the Browser Cache manually. This worked for me. It does not have the exact same functionality as the cache buster, but setting a validity date to the cache suited my needs. You can set the validity of the cache on e.g. a weekly basis on Sunday. Each Sunday the cache is retrieved again from the Gateway server. So when you implement your changes before (in this example) Sunday, your users do not need to clear their cache.
Regards,
Joost