chore(package): update @types/node to version 11.9.3

Closes #241

Author: greenkeeper[bot]

package.json

@@ -45,7 +45,7 @@
     "@types/express": "^4.16.0",
     "@types/fs-extra": "^5.0.3",
     "@types/lru-cache": "^4.1.1",
-    "@types/node": "^10.5.1",
+    "@types/node": "^11.9.3",
     "@types/normalize-package-data": "^2.4.0",
     "@types/promise-retry": "^1.1.2",
     "@types/puppeteer": "^1.5.0",