chore(deps): bump bls from v5.3.0 to v6.0.0 in /native/bls_nif

Bumps [bls](https://github.com/sigp/lighthouse) from v5.3.0 to v6.0.0.
- [Release notes](https://github.com/sigp/lighthouse/releases)
- [Commits](sigp/lighthouse@d6ba8c3...c042dc1)

---
updated-dependencies:
- dependency-name: bls
  dependency-type: direct:production
...

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Author: dependabot[bot]