Merge pull request #42 from scala-steward/update/sbt-bintray-0.6.0

Update sbt-bintray to 0.6.0

Author: t3hnar

project/plugins.sbt

@@ -1,6 +1,6 @@
 externalResolvers += Resolver.bintrayIvyRepo("evolutiongaming", "sbt-plugins")
 
-addSbtPlugin("org.foundweekends" % "sbt-bintray" % "0.5.6")
+addSbtPlugin("org.foundweekends" % "sbt-bintray" % "0.6.0")
 
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.6.1")