setup-dmd GitHub action

[WebFreak001]

On Thursday, 12 September 2019 at 20:46:42 UTC, Dennis wrote:
> On Thursday, 12 September 2019 at 19:07:30 UTC, WebFreak001 
> wrote:
>> ...
>
> So I've seen GitHub actions pop-up suddenly but I can't figure 
> out what it is.
> Googling it gives me some high-level generic description about 
> "workflow automation" but I don't see what concrete problem 
> it's trying to solve. Can anyone please explain what's in it 
> for the hobbyist D coder?
>
> Also I've seen some articles about it dating back to 2018, but 
> apparently you can only recently sign up for the beta.

it's like Travis CI but directly on GitHub (also it supports 
running your tests and workflows on windows)

I got my beta access today which is why I even got to make this