Amaury Trujillo

Hi. Thank you for this gem. Now that Rails 6 seems stable, could it be possible to update the gem dependencies? At the moment it is limited to < 5.3...

Given the deprecation of `where_` methods and changes to queryng on associations introduced by [#1090 in Avram](https://github.com/luckyframework/avram/pull/1090), the guide should be updated to reflect the new approach. The main section...