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

Closes #89

Author: greenkeeper[bot]

package.json

@@ -58,7 +58,7 @@
     "@types/jest": "^23.3.14",
     "@types/lodash": "^4.14.123",
     "@types/node": "^10.14.3",
-    "angular-cli-ghpages": "^0.5.3",
+    "angular-cli-ghpages": "^0.6.1",
     "angular2-template-loader": "^0.6.2",
     "autoprefixer": "^9.5.0",
     "awesome-typescript-loader": "^5.2.1",