chore(package): update eslint to version 3.8.0

https://greenkeeper.io/

package.json

@@ -25,7 +25,7 @@
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-preset-es2015-node6": "^0.3.0",
     "del": "^2.2.2",
-    "eslint": "^3.3.1",
+    "eslint": "^3.8.0",
     "eslint-config-airbnb-base": "^5.0.3",
     "eslint-plugin-import": "^1.14.0",
     "gulp": "git://github.com/gulpjs/gulp.git#4.0",