Bump tar and couchbase

Bumps [tar](https://github.com/isaacs/node-tar) to 6.2.1 and updates ancestor dependency [couchbase](https://github.com/couchbase/couchnode). These dependencies need to be updated together.


Updates `tar` from 4.4.19 to 6.2.1
- [Release notes](https://github.com/isaacs/node-tar/releases)
- [Changelog](https://github.com/isaacs/node-tar/blob/main/CHANGELOG.md)
- [Commits](isaacs/node-tar@v4.4.19...v6.2.1)

Updates `couchbase` from 4.2.4 to 4.4.0
- [Release notes](https://github.com/couchbase/couchnode/releases)
- [Commits](couchbase/couchnode@v4.2.4...v4.4.0)

---
updated-dependencies:
- dependency-name: tar
  dependency-type: indirect
- dependency-name: couchbase
  dependency-type: direct:production
...

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Author: dependabot[bot]