chore(package): update eslint-plugin-node to version 8.0.0

Closes #43

Author: greenkeeper[bot]

package.json

@@ -14,7 +14,7 @@
     "eslint": "^4.0.0",
     "eslint-config-standard": "^11.0.0",
     "eslint-plugin-import": "^2.2.0",
-    "eslint-plugin-node": "^4.2.2",
+    "eslint-plugin-node": "^8.0.0",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
     "execa": "^0.10.0",