Bump tar and npm-check-updates

Removes [tar](https://github.com/isaacs/node-tar). It's no longer used after updating ancestor dependency [npm-check-updates](https://github.com/raineorshine/npm-check-updates). These dependencies need to be updated together.


Removes `tar`

Updates `npm-check-updates` from 16.14.20 to 19.6.5
- [Release notes](https://github.com/raineorshine/npm-check-updates/releases)
- [Changelog](https://github.com/raineorshine/npm-check-updates/blob/main/CHANGELOG.md)
- [Commits](raineorshine/npm-check-updates@v16.14.20...v19.6.5)

---
updated-dependencies:
- dependency-name: tar
  dependency-version: 
  dependency-type: indirect
- dependency-name: npm-check-updates
  dependency-version: 19.6.5
  dependency-type: direct:production
...

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Author: dependabot[bot]