chore: bump duplexify from 3.7.1 to 4.1.2

Bumps [duplexify](https://github.com/mafintosh/duplexify) from 3.7.1 to 4.1.2.
- [Release notes](https://github.com/mafintosh/duplexify/releases)
- [Commits](mafintosh/duplexify@v3.7.1...v4.1.2)

---
updated-dependencies:
- dependency-name: duplexify
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]