Log Message:
databases/ruby-awesome_nested_set: update to 3.4.0

3.4.0 (2021-2-22)

* Keep current scope when calling `roots` [Petrik de Heus](https://github.com/p8)

* STI record now can update counter cache correctly [Issei \ 
Murasawa](http://github.com/issei-m)

* [Compare to \ 
3.3.1](https://github.com/collectiveidea/awesome_nested_set/compare/v3.3.1...v3.4.0)