Bump publint from 0.3.20 to 0.3.21 (#1144)

Bumps [publint](https://github.com/publint/publint/tree/HEAD/packages/publint) from 0.3.20 to 0.3.21.
- [Release notes](https://github.com/publint/publint/releases)
- [Changelog](https://github.com/publint/publint/blob/master/packages/publint/CHANGELOG.md)
- [Commits](https://github.com/publint/publint/commits/publint@0.3.21/packages/publint)

---
updated-dependencies:
- dependency-name: publint
  dependency-version: 0.3.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]