Bump gh-pages from 1.0.0 to 5.0.0 in /firebase-using-vuefire

Bumps [gh-pages](https://github.com/tschaub/gh-pages) from 1.0.0 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@v1.0.0...v5.0.0)

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

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

Author: dependabot[bot]

firebase-using-vuefire/package.json

@@ -63,7 +63,7 @@
     "extract-text-webpack-plugin": "3.0.0",
     "file-loader": "0.11.2",
     "friendly-errors-webpack-plugin": "1.6.1",
-    "gh-pages": "1.0.0",
+    "gh-pages": "5.0.0",
     "html-webpack-plugin": "2.30.1",
     "http-proxy-middleware": "0.17.4",
     "inject-loader": "3.0.1",