Bump serde_repr from 0.1.17 to 0.1.18

Bumps [serde_repr](https://github.com/dtolnay/serde-repr) from 0.1.17 to 0.1.18.
- [Release notes](https://github.com/dtolnay/serde-repr/releases)
- [Commits](dtolnay/serde-repr@0.1.17...0.1.18)

---
updated-dependencies:
- dependency-name: serde_repr
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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