Bump pkg from 5.3.0 to 5.8.1

Bumps [pkg](https://github.com/vercel/pkg) from 5.3.0 to 5.8.1.
- [Release notes](https://github.com/vercel/pkg/releases)
- [Commits](vercel/pkg@5.3.0...5.8.1)

---
updated-dependencies:
- dependency-name: pkg
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>