Do you want to request a feature or report a bug?
I cannot be sure but I suspect it's a mistake. When v4.13.0 was released just now, it reverted npmjs's "latest" tag from 5.0.1 to 4.13.10. Anyone running "npm install mongoose" etc will get 4.x not 5.x
Cc @vkarpov15 as it looks to be your commit, but not sure if you published.