chore(package): update eslint to version 3.19.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -25,7 +25,7 @@
     "babel-plugin-transform-es2015-modules-commonjs": "^6.18.0",
     "babel-preset-power-assert": "^1.0.0",
     "coveralls": "^2.11.9",
-    "eslint": "^3.13.1",
+    "eslint": "^3.19.0",
     "eslint-config-airbnb-base": "^11.0.1",
     "eslint-plugin-import": "^2.2.0",
     "isparta": "^4.0.0",