chore(package): update eslint to version 3.9.1

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -9,7 +9,7 @@
   },
   "devDependencies": {
     "@neogeek/eslint-config-standards": "1.6.3",
-    "eslint": "3.8.1"
+    "eslint": "3.9.1"
   },
   "peerDependencies": {
     "doxdox": "^1.1.x"