Hello @Guiguijo 
I am glad to announce that the new Types implementation has just been released 
To benefit from the new Types, you just have to upgrade your Liana to version 7.9.0. Yes, Types our now directly integrated in the forest-express-mongoose repository, you don’t need to install @types/forest-express-mongoose anymore 
To help you with your migration, we also created a documentation to guide you as much as possible, please refer to this link.
Don’t hesitate to post any issue or frustration you encounter regarding Types, we will be glad to help you out and every feedback are appreciated.
I hope you will enjoy the new version !
Steve.