chore(package): update gh-pages to version 1.1.0

Closes #559

package.json

@@ -35,7 +35,7 @@
     "eslint": "^4.5.0",
     "eslint-config-scratch": "^4.0.0",
     "expose-loader": "0.7.3",
-    "gh-pages": "^0.12.0",
+    "gh-pages": "^1.1.0",
     "got": "5.7.1",
     "highlightjs": "^9.8.0",
     "htmlparser2": "3.9.2",