Cache busting for PWA using latest Ionic

We initially deployed our app in production without having the SWUpdate enabled.

Now, we have a problem of users having our app without having the auto updates enabled.

I have been doing research and the best answers for this seem to be using older versions of Ionic, for example here: Bundled files and cache busting, lazy loading

The above link examples use webpack configs which is not the way current Ionic does it.

Can someone please help?