No feedback is provided to users if no feature path is specified when running Main, which makes it hard to discern why no tests were run.
Classic cucumber will default to run ./features, but this is probably not a good default in JVM land, as features may be in a lot of different places, depending on the project.
I agree we should just raise an error with an explanation.
Fixed by 287bf9b
Fail if no features are found. Closes #163