Bump keypair from 1.0.3 to 1.0.4 (#325)

Bumps [keypair](https://github.com/juliangruber/keypair) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/juliangruber/keypair/releases)
- [Commits](juliangruber/keypair@v1.0.3...v1.0.4)

---
updated-dependencies:
- dependency-name: keypair
  dependency-type: indirect
...

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