feat(workbox): use workbox 4.0.0-0

Author: pooya parsa

packages/workbox/lib/defaults.js

@@ -1,6 +1,6 @@
 module.exports = {
   // General
-  workboxVersion: '4.0.0-rc.4',
+  workboxVersion: '4.0.0-0',
   workboxURL: undefined,
   importScripts: [],
   autoRegister: true,

test/__snapshots__/pwa.test.js.snap

@@ -53,7 +53,7 @@ Array [
 `;
 
 exports[`pwa sw.js 1`] = `
-"importScripts('https://cdn.jsdelivr.net/npm/workbox-cdn@4.0.0-rc.2/workbox/workbox-sw.js', 'custom-sw.js')
+"importScripts('https://cdn.jsdelivr.net/npm/workbox-cdn@4.0.0-0/workbox/workbox-sw.js', 'custom-sw.js')
 
 // --------------------------------------------------
 // Configure