chore(package): update eslint to version 3.18.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
   "devDependencies": {
     "@neogeek/eslint-config-standards": "1.14.0",
     "codecov": "2.0.2",
-    "eslint": "3.17.1",
+    "eslint": "3.18.0",
     "istanbul": "0.4.5",
     "mocha": "3.2.0"
   },