chore(package): update eslint to version 3.13.1

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/northbrookjs/eslint#readme",
   "dependencies": {
-    "eslint": "^3.13.0",
+    "eslint": "^3.13.1",
     "eslint-config-standard": "^6.2.1",
     "eslint-plugin-promise": "^3.4.0",
     "eslint-plugin-standard": "^2.0.1",