lean getters does not work on generative functions

[Marius-Romanus]

Hi!

I'm not sure if it's a bug or a new feature, in cases where generative functions function* are used in mongoose with a cursor provideRouter, and at the same time the implementation of mongoose-lean-getters, it's not working well for me.

It's curious because if instead of doing it natively with for example a for await (const data of cursor), I do it with the "co" library, the .lean({ getters: true }) works correctly.

Same thing happens with map()
https://mongoosejs.com/docs/api/querycursor.html#QueryCursor.prototype.map()

Right now I can't put an example because the one I have is very complex, but if you need it, let me know :)

Regards!