Bump merlin from 2.0.0 to 3.0.0

Bumps [merlin](https://github.com/zkcrypto/merlin) from 2.0.0 to 3.0.0.
- [Release notes](https://github.com/zkcrypto/merlin/releases)
- [Changelog](https://github.com/zkcrypto/merlin/blob/main/CHANGELOG.md)
- [Commits](zkcrypto/merlin@2.0.0...3.0.0)

---
updated-dependencies:
- dependency-name: merlin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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