project/plugins.sbt (4 lines of code) (raw):
addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.10.0-RC1")
addSbtPlugin("com.github.sbt" % "sbt-release" % "1.4.0")
addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.10.0")
addSbtPlugin("ch.epfl.scala" % "sbt-version-policy" % "3.2.0")