BREAKING CHANGE: Update dependency workbox-webpack-plugin to v6

Author: renovate-bot

package.json

@@ -65,7 +65,7 @@
     "webpack-dev-server": "3.11.0",
     "webpack-manifest-plugin": "2.2.0",
     "whatwg-fetch": "3.5.0",
-    "workbox-webpack-plugin": "4.3.1"
+    "workbox-webpack-plugin": "6.5.1"
   },
   "devDependencies": {
     "@commitlint/cli": "11.0.0",