build(deps): bump tough-cookie and newman (#835)

Removes [tough-cookie](https://github.com/salesforce/tough-cookie). It's no longer used after updating ancestor dependency [newman](https://github.com/postmanlabs/newman). These dependencies need to be updated together.


Removes `tough-cookie`

Updates `newman` from 5.3.2 to 6.0.0
- [Changelog](https://github.com/postmanlabs/newman/blob/develop/CHANGELOG.yaml)
- [Commits](postmanlabs/newman@v5.3.2...v6.0.0)

---
updated-dependencies:
- dependency-name: tough-cookie
  dependency-type: indirect
- dependency-name: newman
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>