Added release settings to root to enable cross release again.

Author: manub

build.sbt

@@ -58,6 +58,7 @@ lazy val root = (project in file("."))
   .settings(commonSettings: _*)
   .settings(publishArtifact := false)
   .settings(publish := {})
+  .settings(releaseSettings: _*)
   .disablePlugins(BintrayPlugin)
   .settings(publishTo := Some(Resolver.defaultLocal))
   .aggregate(embeddedKafka, kafkaStreams)