Bump dmd to 2.074.0

[wilzbach]

Bumps to 2.073.0 - this is interesting because e.g. compiling ~/dlang/phobos/std/algorithm/comparison.d took 1.9s on 2.071.0, whereas with 2.073.0 it takes only 0.8s

This is based on the fact that before 2.072 rdmd used to compile the main file twice, see e.g.

dlang/tools#194
dlang/tools#207

[wilzbach]

Hmm seems like this needs more adjustment:

[wilzbach]

I tried to configure a new Docker container that uses GH push events to rebuild the container, s.t. credentials don't need to be exposed here.
However, it seems that this takes a long time:

https://cloud.docker.com/swarm/dlangtour/repository/docker/dlangtour/dlang-tour-rdmd/general

[wilzbach]

However, it seems that this takes a long time:

That's why I reverted the change and simply moved the deployment scripts to the proper "deployment" section in the travis.yml

[wilzbach]

CC @ZombineDev

What do you think? Should I press the "magic" button, upgrade our docker image to 2.074 and re-trigger the main Travis CI build, s.t. broken examples can be found?

[PetarKirov]

Yes, please do

[wilzbach]

upgrade our docker image to 2.074 and re-trigger the main Travis CI build, s.t. broken examples can be found?

I just realized that there should be zero breakage, because in Travis CI we already test with the latest greatest DMD ;-)
Let's just hope that this gets properly deployed ...