DUB: link to local library

[rcor via Digitalmars-d-learn]

> I think I recently saw something like:
>
> "dependencies": {
>         "dallegro5": { "version": "~master", "path": 
> "../path/to/your/lib" }
> }
>
> Although I haven't tried it yet.
>
> Bye, Jeroen

I believe you're talking about this:
https://github.com/D-Programming-Language/dub/issues/119
and unfortunately it doesn't seem to help.