Bump gh-pages from 2.0.1 to 2.2.0

Bumps [gh-pages](https://github.com/tschaub/gh-pages) from 2.0.1 to 2.2.0.
- [Release notes](https://github.com/tschaub/gh-pages/releases)
- [Changelog](https://github.com/tschaub/gh-pages/blob/master/changelog.md)
- [Commits](tschaub/gh-pages@v2.0.1...v2.2.0)

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

Author: dependabot-preview[bot]

package.json

@@ -59,7 +59,7 @@
     "eslint-plugin-babel": "^5.3.0",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-jest": "^23.13.1",
-    "gh-pages": "2.0.1",
+    "gh-pages": "2.2.0",
     "html-loader": "1.1.0",
     "html-webpack-plugin": "4.3.0",
     "jest": "26.0.1",