chore(deps): update dependency gh-pages to v5 [security]

Author: renovate[bot]

package.json

@@ -62,7 +62,7 @@
     "cz-conventional-changelog": "^3.3.0",
     "drnm": "^0.9.0",
     "filesize": "^8.0.3",
-    "gh-pages": "^3.1.0",
+    "gh-pages": "^5.0.0",
     "glob": "^7.1.6",
     "html-format": "^1.0.1",
     "lit-element": "^3.0.0",