#comment added a enum to store all types of AutoUpdater events, exten…

[topnotch48]

Hello, again. I was working with your package and i've faced the situation when it does not emit any events and is unable to continue to work if my archive was somehow corrupted. I've extended 'extract' method a little bit and also moved all event types into static enum on AutoUpdater class to get rid of events copy pasting in client's code.

please take a look.