Merge pull request #456 from KnisterPeter/greenkeeper/@types/node-9.3.0

Update @types/node to the latest version 🚀

Author: KnisterPeter

package.json

@@ -41,7 +41,7 @@
     "@types/babel-generator": "^6.25.0",
     "@types/diff": "^3.2.2",
     "@types/execa": "0.8.1",
-    "@types/node": "^8.0.50",
+    "@types/node": "^9.3.0",
     "@types/prop-types": "15.5.2",
     "@types/react": "^16.0.21",
     "ava": "^0.24.0",