fix(workbox): missing required parameter request for handle()

[Yihao-G]

According to the Workbox Migration Guide:

In v5, handle() treats request as a required parameter, and will not fall back to using event.request. Make sure that you pass in a valid request when calling handle().¹

However, our sw.js template only passes event parameter.

This causes websites with offlinePage setup always redirects to the offline page.

This pull request fixes it.

_{^{1. However, the reference docs seems have not been updated.}}

[codecov]

Codecov Report

Merging #335 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #335   +/-   ##
=======================================
  Coverage   85.43%   85.43%           
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  Files          10       10           
  Lines         357      357           
  Branches      108      108           
=======================================
  Hits          305      305           
  Misses         48       48           
  Partials        4        4           

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[pi0]

Perfect thanks! 👍

[pi0]

https://github.com/nuxt-community/pwa-module/releases/tag/v3.0.2