chore(package): update emberx-select to version 2.2.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -49,7 +49,7 @@
     "ember-route-alias": "^0.1.3",
     "ember-suave": "4.0.0",
     "ember-welcome-page": "^1.0.1",
-    "emberx-select": "2.1.2",
+    "emberx-select": "2.2.0",
     "loader.js": "4.0.10"
   }
 }