Bump github.com/swift-libp2p/swift-varint from 0.0.1 to 0.0.2

Bumps [github.com/swift-libp2p/swift-varint](https://github.com/swift-libp2p/swift-varint) from 0.0.1 to 0.0.2.
- [Commits](swift-libp2p/swift-varint@0.0.1...0.0.2)

---
updated-dependencies:
- dependency-name: github.com/swift-libp2p/swift-varint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]