chore(package): update yarn to version 0.22.0 (#397)

https://greenkeeper.io/

package.json

@@ -150,7 +150,7 @@
     "tslint-jsdoc-rules": "^0.1.2",
     "tuling123-client": "0.0.1",
     "typescript": "2.2.2",
-    "yarn": "0.21.3"
+    "yarn": "0.22.0"
   },
   "files_comment__whitelist_npm_publish": "http://stackoverflow.com/a/8617868/1123955",
   "files": [