Bump Scala and Sbt versions.
More information during `sbt abide`.

* warn if no rules are applied
* show how many rules are applied
* log debug info about arguments passed to scalac.
Be more robust in case some types are missing on the class path in akka-specific rules.
Rule for nullary methods of Unit type.

Warns when a nullary method's result type is Unit.
isInstanceOf and asInstanceOf ported from scapegoat as one abide rule
Merge pull request #17 from dragos/issue/sbt-more-info

More information during `sbt abide`.
Merge pull request #19 from dragos/issue/crash-akka-rule

Be more robust in case some types are missing on the class path
Merge pull request #20 from Lewix/nullaryunit

Rule for nullary methods of Unit type.
Merge pull request #24 from johanandren/rules/size-empty-nonempty

Rule for avoiding size equals or not equals zero on Traversables
Merge pull request #28 from johanandren/rules/as-instance-of

Warn on usage of isInstanceOf and asInstanceOf
Rule for inferences of Any

It uses tpt.original == null to check whether a TypeTree was inferred or not.