Bump gcn-kafka from 0.2.3 to 0.3.0

Bumps [gcn-kafka](https://github.com/nasa-gcn/gcn-kafka-js) from 0.2.3 to 0.3.0.
- [Release notes](https://github.com/nasa-gcn/gcn-kafka-js/releases)
- [Commits](nasa-gcn/gcn-kafka-js@v0.2.3...v0.3.0)

---
updated-dependencies:
- dependency-name: gcn-kafka
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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