Bump cookie, express and swagger-client in /swagger

Bumps [cookie](https://github.com/jshttp/cookie), [express](https://github.com/expressjs/express) and [swagger-client](https://github.com/swagger-api/swagger-js). These dependencies needed to be updated together.

Updates `cookie` from 0.6.0 to 0.7.1
- [Release notes](https://github.com/jshttp/cookie/releases)
- [Commits](jshttp/cookie@v0.6.0...v0.7.1)

Updates `express` from 4.21.0 to 4.21.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.1/History.md)
- [Commits](expressjs/express@4.21.0...4.21.1)

Updates `swagger-client` from 3.28.2 to 3.29.4
- [Release notes](https://github.com/swagger-api/swagger-js/releases)
- [Changelog](https://github.com/swagger-api/swagger-js/blob/master/.releaserc)
- [Commits](swagger-api/swagger-js@v3.28.2...v3.29.4)

---
updated-dependencies:
- dependency-name: cookie
  dependency-type: indirect
- dependency-name: express
  dependency-type: indirect
- dependency-name: swagger-client
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>