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

Closes #58

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
     "@types/jest": "^22.2.3",
     "@types/lodash": "^4.14.123",
     "@types/node": "^8.10.45",
-    "angular-cli-ghpages": "^0.5.3",
+    "angular-cli-ghpages": "^0.6.1",
     "angular2-template-loader": "^0.6.2",
     "ansi-colors": "^3.2.4",
     "autoprefixer": "^9.5.0",