fix: Apply changes for service-worker API

From sveltejs/kit#4213

src/service-worker.ts

@@ -1,7 +1,7 @@
-import { build, files, timestamp } from '$service-worker';
+import { build, files, version } from '$service-worker';
 import { precacheAndRoute, precache } from 'workbox-precaching';
 import { registerRoute } from 'workbox-routing';
-import {StaleWhileRevalidate} from 'workbox-strategies';
+import { StaleWhileRevalidate } from 'workbox-strategies';
 
 declare let self: ServiceWorkerGlobalScope
 
@@ -22,23 +22,23 @@ precacheAndRoute([
     ...files.map(f => {
         return {
             url: f,
-            revision: `${timestamp}`
+            revision: `${version}`
         }
     })
 ]);
 
 // Edit the list of routes so they get cached and routed correctly, allowing
 // cold start or hot reload to work offline.
-const skRoutes = [ '/', '/about', '/todos' ];
+const skRoutes = ['/', '/about', '/todos'];
 
-precache( skRoutes.map(f => {
+precache(skRoutes.map(f => {
     return {
         url: f,
-        revision: `${timestamp}`
+        revision: `${version}`
     }
-}) );
+}));
 
-const matchCb = ({url, request, event}) => {
+const matchCb = ({ url, request, event }) => {
     return skRoutes.some(path => url.pathname === path);
 };
 registerRoute(matchCb, new StaleWhileRevalidate({}));