Merge pull request #14 from mongodb-js/greenkeeper-eslint-2.5.3

eslint@2.5.3 breaks build 🚨

Author: imlucas

package.json

@@ -23,7 +23,7 @@
   "dependencies": {},
   "devDependencies": {
     "babel-eslint": "^6.0.0",
-    "eslint": "^2.3.0",
+    "eslint": "^2.5.3",
     "eslint-plugin-react": "^4.2.0",
     "mocha": "^2.3.4",
     "mongodb-js-fmt": "0.0.3",