Bump generator-jhipster from 8.5.0 to 8.7.3

Bumps [generator-jhipster](https://github.com/jhipster/generator-jhipster) from 8.5.0 to 8.7.3.
- [Release notes](https://github.com/jhipster/generator-jhipster/releases)
- [Commits](jhipster/generator-jhipster@v8.5.0...v8.7.3)

---
updated-dependencies:
- dependency-name: generator-jhipster
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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