Bump dead_end from 3.1.1 to 4.0.0 (#1329)
Bump dead_end from 3.1.1 to 4.0.0 (#1329)

Bumps [dead_end](https://github.com/zombocom/dead_end) from 3.1.1 to 4.0.0.
- [Release notes](https://github.com/zombocom/dead_end/releases)
- [Changelog](https://github.com/ruby/syntax_suggest/blob/main/CHANGELOG.md)
- [Commits](https://github.com/zombocom/dead_end/compare/v3.1.1...v4.0.0)

---
updated-dependencies:
- dependency-name: dead_end
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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>
heroku/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby