fix(demo): updated nguniversal packages

Author: AnthonyNahas

demo/package-lock.json

@@ -66,8 +66,8 @@
     "@angular/compiler-cli": "8.1.2",
     "@angular/language-service": "8.1.2",
     "@angularclass/hmr": "~2.1.3",
-    "@nguniversal/express-engine": "^7.1.1",
-    "@nguniversal/module-map-ngfactory-loader": "^7.1.1",
+    "@nguniversal/express-engine": "^8.1.1",
+    "@nguniversal/module-map-ngfactory-loader": "^8.1.1",
     "@types/jasmine": "^3.3.13",
     "@types/jasminewd2": "^2.0.6",
     "@types/node": "^10.14.12",