Merge pull request #2 from palashmon/greenkeeper/xo-0.22.0

Update xo to the latest version 🚀

Author: palashmon

package.json

@@ -32,6 +32,6 @@
 	"devDependencies": {
 		"ava": "^0.25.0",
 		"nyc": "^12.0.2",
-		"xo": "^0.21.1"
+		"xo": "^0.22.0"
 	}
 }