Increase timeouts for running all D versions

[wilzbach]

At the moment when running all D versions, one gets timeouts:

https://github.com/dlang-tour/core/pull/585#issuecomment-317210366

Ideas to solve it:

• increase timeout
• more memory?

[wilzbach]

Update - it does seem to work now: https://is.gd/ckNT9i :)

As the replacement doesn't seem to work well, let's do it on the client then.