Merge pull request lazychaser#307 from bonzai/v4

Support Laravel 5.7

Update

Fixed lazychaser#252: nested eagers for ancestors and descendants are…

… now loaded

Bump minor version

lazychaser#217: parent_id, lft and rgt are reset when replicating a node

Fixed eager loading with scoping

Refactored ancestors and descendants relations

Update changelog

Update

Support old ver