How does the D compiler get updated on travis-ci.org?

[Gary Willoughby via Digitalmars-d]

On Thursday, 26 March 2015 at 19:37:06 UTC, extrawurst wrote:
> i think it is already available on travis. this it what works 
> for me:
> https://github.com/Extrawurst/unecht/blob/master/.travis.yml
>
> ```
> language: d
>
> d:
>   - dmd-2.067.0
> ```

I'm just using:

language: d

I hoped this would pick up the latest version.