Improve bin/test
Improve bin/test

Previously we were _only_ running tests on CI against the mac target.
This seems short sighted. Instead, lets make sure we can build for all
of our supported platforms, running the tests on the platforms that
support it.

alskipp/Argo,ojolabs/Argo,koher/Argo,alskipp/Argo,thoughtbot/Argo,koher/Argo,alskipp/Argo,thoughtbot/Argo,ojolabs/Argo,ojolabs/Argo,thoughtbot/Argo,koher/Argo