Bump tough-cookie and tap

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


Removes `tough-cookie`

Updates `tap` from 14.11.0 to 18.6.1
- [Release notes](https://github.com/tapjs/tapjs/releases)
- [Commits](https://github.com/tapjs/tapjs/compare/v14.11.0...tap@18.6.1)

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

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