chore(package): update @types/node to version 11.9.1

Closes #128

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
   "devDependencies": {
     "@types/enzyme": "^3.1.0",
     "@types/jest": "^23.0.0",
-    "@types/node": "^10.0.3",
+    "@types/node": "^11.9.1",
     "@types/react": "^16.0.5",
     "@types/react-dom": "^16.0.0",
     "@types/webpack": "^4.1.3",