Update irb requirement from ~> 1.4.2 to ~> 1.4.3 (#56)
Update irb requirement from ~> 1.4.2 to ~> 1.4.3 (#56)

Updates the requirements on [irb](https://github.com/ruby/irb) to permit the latest version.
- [Release notes](https://github.com/ruby/irb/releases)
- [Commits](https://github.com/ruby/irb/compare/v1.4.2...v1.4.3)

---
updated-dependencies:
- dependency-name: irb
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
kachick/adjustn,kachick/adjustn