Improve documentation?

Issue Summary

The plugin page says you can choose between 3 versions of jQuery to update to. But from what I can tell, it just upgrades to the lowest of those 3 and that's all it does. If there's some super-secret configuration page somewhere, you should probably talk about it in the documentation.

Thanks very much for your work on the module, Drupal without at least a semi-recent jQuery is pretty much worthless so I am very glad you maintain this.