Add --test so that test dependencies are built

[istathar]

I've been poking away at trying to solve #65 . My hypothesis is that all I need to do is add --test --no-run-tests (and maybe --bench --no-run-benchmarks for completeness) to stackAction and we're done?

[istathar]

(I'm really not sure at the wisdom of this, but I wanted to have a go)

[mpickering]

@afcowie I don't think you are solving any problem with hie-bios. The issue is that ghcide doesn't pass a filepath when it calls the cradle.

If you run stack repl /path/to/test/file.hs then it will work correctly and build test dependencies I think.