build(deps-dev): 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-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -139,7 +139,7 @@
     "eslint-plugin-qunit": "^8.1.2",
     "fstream": "^1.0.12",
     "gulp": "^4.0.2",
-    "gulp-zip": "^5.1.0",
+    "gulp-zip": "^6.1.0",
     "loader.js": "^4.7.0",
     "normalize.css": "8.0.1",
     "pretender": "^3.4.7",