no issue
- replace logic for preparing nested tags
- if you have nested tags in your file, we won't update or update the target tag
- we simply would like to add the relationship to the database
- use same approach as base class
- add `posts_tags` to target post model
- update identifiers
- insert relation by foreign key `tag_id`
- bump bookshelf-relations to 0.1.10
68d8154d4f