Bump gulp-zip from 5.1.0 to 6.1.0

Bumps [gulp-zip](https://github.com/sindresorhus/gulp-zip) from 5.1.0 to 6.1.0.
- [Release notes](https://github.com/sindresorhus/gulp-zip/releases)
- [Commits](sindresorhus/gulp-zip@v5.1.0...v6.1.0)

---
updated-dependencies:
- dependency-name: gulp-zip
  dependency-version: 6.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]