Bump xml2js and @nuxtjs/pwa in /src

Removes [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js). It's no longer used after updating ancestor dependency [@nuxtjs/pwa](https://github.com/nuxt-community/pwa-module). These dependencies need to be updated together.


Removes `xml2js`

Updates `@nuxtjs/pwa` from 2.6.0 to 3.3.5
- [Release notes](https://github.com/nuxt-community/pwa-module/releases)
- [Changelog](https://github.com/nuxt-community/pwa-module/blob/main/CHANGELOG.md)
- [Commits](nuxt-community/pwa-module@v2.6.0...v3.3.5)

---
updated-dependencies:
- dependency-name: xml2js
  dependency-type: indirect
- dependency-name: "@nuxtjs/pwa"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>