Hi federica,
You are welcome, I respect your work!
As I think it is more than enough if you make this fix setColumnAlias() and no need to rename state to published. There are a lot of third party components with state field.
But I propose you to fix a little "copy-paste" bug in the install.sql at #82.
Please change this:
KEY `idx_idauth` (`idtag`)
to this:
KEY `idx_idtag` (`idtag`)
Have a nice December!