Bump buffer from 5.7.1 to 6.0.3 (#7)

Bumps [buffer](https://github.com/feross/buffer) from 5.7.1 to 6.0.3.
- [Release notes](https://github.com/feross/buffer/releases)
- [Commits](feross/buffer@v5.7.1...v6.0.3)

---
updated-dependencies:
- dependency-name: buffer
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]