chore(package): update @nguniversal/module-map-ngfactory-loader to version 8.1.1

Closes #36

Author: greenkeeper[bot]

demo/package.json

@@ -65,7 +65,7 @@
     "@angular/language-service": "^7.2.11",
     "@angularclass/hmr": "~2.1.3",
     "@nguniversal/express-engine": "^7.1.1",
-    "@nguniversal/module-map-ngfactory-loader": "^7.1.1",
+    "@nguniversal/module-map-ngfactory-loader": "^8.1.1",
     "@types/jest": "^24.0.11",
     "@types/node": "^10.14.4",
     "codelyzer": "^4.5.0",