.os reports 'Linux' for Android devices

[vichle]

I guess it is technically correct, but with Android being the vast majority of all Linux users, I think it needs to be separated from the rest. Please discuss! :)

[angelcustodio]

I did it in this fork https://github.com/angelcustodio/express-useragent-exposer

[Malikx-Alee]

@angelcustodio Why didn't you merge the fork into this repository? As you are contributor to this repository this would be nice to have all required things in a single repo.