Bump sequencer-utils from 8caa334 to 19a7285

Bumps [sequencer-utils](https://github.com/EspressoSystems/espresso-sequencer) from `8caa334` to `19a7285`.
- [Release notes](https://github.com/EspressoSystems/espresso-sequencer/releases)
- [Commits](EspressoSystems/espresso-sequencer@8caa334...19a7285)

---
updated-dependencies:
- dependency-name: sequencer-utils
  dependency-type: direct:production
...

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