chore(package): update eslint to version 3.19.0

https://greenkeeper.io/

Author: greenkeeperio-bot

Diff for: package.json

@@ -63,7 +63,7 @@
     "conventional-changelog-cli": "^1.2.0",
     "conventional-changelog-lint": "^1.1.0",
     "coveralls": "^2.11.9",
-    "eslint": "^3.14.1",
+    "eslint": "^3.19.0",
     "eslint-config-xo": "^0.17.0",
     "eslint-formatter-pretty": "^1.1.0",
     "eslint-plugin-ava": "^4.0.1",