chore(package): update @nguniversal/common to version 8.2.6

Closes #51

Author: greenkeeper[bot]

demo/package.json

@@ -56,7 +56,7 @@
     "@angular/language-service": "^7.2.8",
     "@angularclass/hmr": "~2.1.3",
     "@compodoc/gulp-compodoc": "^0.0.9",
-    "@nguniversal/common": "^7.1.1",
+    "@nguniversal/common": "^8.2.6",
     "@nguniversal/express-engine": "^7.1.1",
     "@nguniversal/module-map-ngfactory-loader": "^7.1.1",
     "@types/jest": "^23.3.14",