Merge pull request #251 from ipfs/greenkeeper-eslint-2.8.0

Update eslint to version 2.8.0 🚀

Author: daviddias

package.json

@@ -29,7 +29,7 @@
     "babel-runtime": "^6.3.19",
     "chai": "^3.4.1",
     "concurrently": "^2.0.0",
-    "eslint": "2.2.0",
+    "eslint": "2.8.0",
     "eslint-config-standard": "^5.1.0",
     "eslint-plugin-promise": "^1.0.8",
     "eslint-plugin-standard": "^1.3.1",