chore(package): update angular-cli-ghpages to version 0.6.1

Closes #58

Author: greenkeeper[bot]

demo/package.json

@@ -61,7 +61,7 @@
     "@nguniversal/module-map-ngfactory-loader": "^7.1.1",
     "@types/jest": "^23.3.14",
     "@types/node": "~10.9.4",
-    "angular-cli-ghpages": "^0.5.3",
+    "angular-cli-ghpages": "^0.6.1",
     "codelyzer": "^4.5.0",
     "express": "^4.16.4",
     "http-server": "^0.11.1",