chore(package): update @types/node to version 11.9.0

Author: greenkeeper[bot]

package.json

@@ -9,7 +9,7 @@
     "@types/amqplib": "^0.5.4",
     "@types/chai": "^4.0.4",
     "@types/mocha": "^5.0.0",
-    "@types/node": "^10.12.18",
+    "@types/node": "^11.9.0",
     "@types/shelljs": "^0.8.0",
     "chai": "^4.1.2",
     "mocha": "^5.0.4",