Update sbt-release to 1.5.0 (#499)

Author: scala-steward

project/plugins.sbt

@@ -5,7 +5,7 @@ addSbtPlugin("org.scoverage" %% "sbt-scoverage" % "2.4.4")
 addSbtPlugin("org.scoverage" %% "sbt-coveralls" % "1.3.15")
 
 // https://github.com/sbt/sbt-release
-addSbtPlugin("com.github.sbt" % "sbt-release" % "1.4.0")
+addSbtPlugin("com.github.sbt" % "sbt-release" % "1.5.0")
 
 // https://github.com/xerial/sbt-sonatype
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")