chore(package): update eslint-config-xo to version 0.22.2

Closes #352

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
   "devDependencies": {
     "eslint": "^4.18.0",
     "eslint-config-google": "^0.9.1",
-    "eslint-config-xo": "^0.20.1"
+    "eslint-config-xo": "^0.22.2"
   },
   "engines": {
     "node": ">=4.0.0"