Bump the dependencies group with 1 update

Bumps the dependencies group with 1 update: [ed25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek).

- [Release notes](https://github.com/dalek-cryptography/curve25519-dalek/releases)
- [Changelog](https://github.com/dalek-cryptography/curve25519-dalek/blob/2.1.0/CHANGELOG.md)
- [Commits](dalek-cryptography/curve25519-dalek@2.0.0...2.1.0)

---
updated-dependencies:
- dependency-name: ed25519-dalek
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

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