Bumps [rector/rector](https://github.com/rectorphp/rector) from 2.1.4 to 2.1.5.
- [Release notes](https://github.com/rectorphp/rector/releases)
- [Commits](https://github.com/rectorphp/rector/compare/2.1.4...2.1.5)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-version: 2.1.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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