Update scala-graph library to eliminate scalacheck from runtime

[alkersan]

Problem
features module at the moment is using scala-graph 1.11.2 library, which has transitive dependency on scalacheck testing library, but not in the test or optional scope. Probably it was a minor mistake in the early days of scala-graph development, which was fixed quite long ago. From the end-user perspective this might be suspicious at minimum, e.g. my first question during dependency troubleshooting and spark job assembly building was: what this test dependency is doing in the runtime?

Solution
The aforementioned fix is available since 1.11.4, while the last version in the 1.11 branch is 1.11.5.
Solution might be as simple as bumping the scalaGraphVersion, thus reducing dependency tree a bit and simplifying the assembly building for the users.

[tovbinm]

@alkersan thank you for pointing this out. I will make a PR with the version bump.