Bug: emailToAccountMap is missing when call to saveStateAsync function

There is a problem that emailToAccountMap is missing when saving. This problem is also present in the origin code-push-standalone repository. Please refer to the link for any changes that need to be made.

https://github.com/nmengual/code-push-server/commit/35940811ceeac35525b8a1bbd967c4676a3b1816