Bumps [npm-pkgbuild](https://github.com/arlac77/npm-pkgbuild) from 15.3.19 to 15.3.21.
- [Release notes](https://github.com/arlac77/npm-pkgbuild/releases)
- [Commits](https://github.com/arlac77/npm-pkgbuild/compare/v15.3.19...v15.3.21)

---
updated-dependencies:
- dependency-name: npm-pkgbuild
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>