chore(package): update eslint to version 3.19.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -22,7 +22,7 @@
     "chokidar-cli": "^1.0.1",
     "codecov.io": "^0.1.2",
     "coveralls": "^2.11.2",
-    "eslint": "^1.5.0",
+    "eslint": "^3.19.0",
     "istanbul": "^0.3.14",
     "tape": "^4.0.0"
   },