Bump gh-pages from 2.2.0 to 5.0.0

Bumps [gh-pages](https://github.com/tschaub/gh-pages) from 2.2.0 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@v2.2.0...v5.0.0)

---
updated-dependencies:
- dependency-name: gh-pages
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -25,7 +25,7 @@
   "devDependencies": {
     "@types/jest": "^24.0.3",
     "copy-webpack-plugin": "^5.0.4",
-    "gh-pages": "^2.0.1",
+    "gh-pages": "^5.0.0",
     "html-webpack-plugin": "^3.2.0",
     "jest": "23",
     "prettier": "^1.16.4",