Upgrade and breaking change in cloudscribe PWAKit

[CrispinF]

We've upgraded the cloudscribe PWAKit https://www.cloudscribe.com/cloudscribe-pwakit
cloudscribe.PwaKit version 3.1.3 will be released on 4th November 2021, making use of the newest version of the Google Workbox service worker (v.6.2.0).

This is a breaking change, which means that on upgrading to v3.1.3 of this cloudscribe component, you will need to modify the options in your appsettings.json to reference that newer version 6.2.0 of Workbox, as shown:

  "PwaOptions": {
   // other options as before…
    "WorkBoxUrl": https://storage.googleapis.com/workbox-cdn/releases/6.2.0/workbox-sw.js
}

Continuing to reference the older v4.x of Workbox will result in console errors, and the PWA caching will not function correctly.