chore: bump xmldom and electron-packager (#517)

Removes [xmldom](https://github.com/xmldom/xmldom). It's no longer used after updating ancestor dependency [electron-packager](https://github.com/electron/electron-packager). These dependencies need to be updated together.


Removes `xmldom`

Updates `electron-packager` from 12.2.0 to 16.0.0
- [Release notes](https://github.com/electron/electron-packager/releases)
- [Changelog](https://github.com/electron/electron-packager/blob/main/NEWS.md)
- [Commits](electron/packager@v12.2.0...v16.0.0)

---
updated-dependencies:
- dependency-name: xmldom
  dependency-type: indirect
- dependency-name: electron-packager
  dependency-type: direct:development
...

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Author: dependabot[bot]