chore(package): update eslint-config-xo to version 0.17.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -76,7 +76,7 @@
     "babel-register": "^6.11.6",
     "coveralls": "^2.11.12",
     "eslint": "^3.2.2",
-    "eslint-config-xo": "^0.15.3",
+    "eslint-config-xo": "^0.17.0",
     "eslint-formatter-pretty": "^1.0.0",
     "eslint-plugin-ava": "^3.0.0",
     "eslint-plugin-babel": "^3.3.0",