Consider workaround for stalled builds

[MichaelXavier]

I just dealt with this in a project that depends on bloodhound. I think because the bloodhound package itself take so long to compile, combined with the probably pretty slow hardware on travis free, we often stall out because there's no output after 10 minutes. I added the following to my project's install stanza in .travis.yaml: - while true; do echo "travis pls"; sleep 30; done & and it worked. I figured I'd ask here before doing something so ridiculous on this project.

[bitemyapp]

I think this is fixed now. All hail stack build --fast and 10gb of TravisCI cache.