Add sbt-release plugin

Author: sirthias

build.sbt

@@ -83,3 +83,23 @@ pomIncludeRepository := { _ ⇒
   false
 }
 publishTo := sonatypePublishTo.value
+
+import ReleaseTransformations._
+releasePublishArtifactsAction := PgpKeys.publishSigned.value
+releaseCrossBuild := true
+Seq(
+  releaseCrossBuild := true,
+  releasePublishArtifactsAction := PgpKeys.publishSigned.value,
+  releaseProcess := Seq[ReleaseStep](
+    checkSnapshotDependencies,
+    inquireVersions,
+    runClean,
+    runTest,
+    setReleaseVersion,
+    commitReleaseVersion,
+    tagRelease,
+    publishArtifacts,
+    setNextVersion,
+    commitNextVersion,
+    releaseStepCommand("sonatypeReleaseAll"),
+    pushChanges))

project/plugins.sbt

@@ -1,4 +1,5 @@
 addSbtPlugin("com.lucidchart"    % "sbt-scalafmt" % "1.15")
 addSbtPlugin("de.heikoseeberger" % "sbt-header"   % "4.1.0")
 addSbtPlugin("com.jsuereth"      % "sbt-pgp"      % "1.1.0")
+addSbtPlugin("com.github.gseitz" % "sbt-release"  % "1.0.7")
 addSbtPlugin("org.xerial.sbt"    % "sbt-sonatype" % "2.3")