Bump gh-pages from 4.0.0 to 5.0.0

Bumps [gh-pages](https://github.com/tschaub/gh-pages) from 4.0.0 to 5.0.0.
- [Release notes](https://github.com/tschaub/gh-pages/releases)
- [Changelog](https://github.com/tschaub/gh-pages/blob/main/changelog.md)
- [Commits](tschaub/gh-pages@v4.0.0...v5.0.0)

---
updated-dependencies:
- dependency-name: gh-pages
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -53,7 +53,7 @@
     "browserify": "^17.0.0",
     "butternut": "~0.4.6",
     "coverify": "^1.5.1",
-    "gh-pages": "~4.0.0",
+    "gh-pages": "~5.0.0",
     "rollup": "~2.79.0",
     "marked": "~4.1.0",
     "rollup-plugin-buble": "~0.19.8",