Feature: scala upgradability check

[nafg]

Right now it shows output like

[info] Found 1 dependency update for chavrusa-backend
[info]   org.scala-lang:scala-library : 2.11.8 -> 2.12.0

What it really means to me however is that a new scala version is on maven. But that's useless if my dependencies aren't published for it.

Suggestion: Don't show dependency update for scala-library. Instead, it should separately say "new scala version available," and show which libraries have been published for it. The library for the new scala may not have the same version as for the current scala.
There are a few cases, I don't know if they can be identified reliably.

• Java libraries don't care about the scala version and are always fine
• Most scala libraries only care about the scala binary version (2.11.x is one scala); they must be available with the right suffix (e.g. _2.11)
• A few are versioned with the full scala version (scala-library, scala-reflect, etc.) They typically have no suffix and match by their own artifact version (e.g. 2.11.8 for scala 2.11.8)