Bump pm2 from 5.4.1 to 5.4.2

Bumps [pm2](https://github.com/Unitech/pm2) from 5.4.1 to 5.4.2.
- [Release notes](https://github.com/Unitech/pm2/releases)
- [Changelog](https://github.com/Unitech/pm2/blob/master/CHANGELOG.md)
- [Commits](Unitech/pm2@v5.4.1...v5.4.2)

---
updated-dependencies:
- dependency-name: pm2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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