dub: how to update package?

[Intersteller via Digitalmars-d-learn]

On Saturday, 17 September 2016 at 07:37:23 UTC, Suliman wrote:
> On Saturday, 17 September 2016 at 07:25:29 UTC, Intersteller 
> wrote:
>> I have a dub project, is there a way to update to get the 
>> latest package?
>
> dub upgrade

I mean, I would like to update the packages used by a project. 
Not dub itself.

Specifically, I would like to update vibe.d from an older version 
to a newer one.