chore(package): update eslint-plugin-node to version 5.1.1

Closes #9

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "eslint": "^3.19.0",
     "eslint-config-standard": "^10.2.0",
     "eslint-plugin-import": "^2.2.0",
-    "eslint-plugin-node": "^4.2.2",
+    "eslint-plugin-node": "^5.1.1",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
     "istanbul": "^0.4.5",