Bump gh-pages from 2.2.0 to 3.0.0 (#254)

Bumps [gh-pages](https://github.com/tschaub/gh-pages) from 2.2.0 to 3.0.0.
- [Release notes](https://github.com/tschaub/gh-pages/releases)
- [Changelog](https://github.com/tschaub/gh-pages/blob/master/changelog.md)
- [Commits](tschaub/gh-pages@v2.2.0...v3.0.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package.json

@@ -42,7 +42,7 @@
     "coveralls": "^3.0.3",
     "expect.js": "0.3.x",
     "fs-extra": "^9.0.0",
-    "gh-pages": "^2.2.0",
+    "gh-pages": "^3.0.0",
     "jest": "^20.0.1",
     "pre-commit": "1.x",
     "raf": "^3.4.0",