Bump doctrine/orm from 3.1.1 to 3.2.1

Bumps [doctrine/orm](https://github.com/doctrine/orm) from 3.1.1 to 3.2.1.
- [Release notes](https://github.com/doctrine/orm/releases)
- [Commits](doctrine/orm@3.1.1...3.2.1)

---
updated-dependencies:
- dependency-name: doctrine/orm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>