Merge pull request #149 from scala-steward/update/sbt-release-1.0.13

Update sbt-release to 1.0.13

Author: exoego

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("org.scala-js"      % "sbt-scalajs"   % "0.6.31")
 addSbtPlugin("org.scalameta"     % "sbt-scalafmt"  % "2.3.0")
 addSbtPlugin("org.xerial.sbt"    % "sbt-sonatype"  % "3.8.1")
-addSbtPlugin("com.github.gseitz" % "sbt-release"   % "1.0.12")
+addSbtPlugin("com.github.gseitz" % "sbt-release"   % "1.0.13")
 addSbtPlugin("com.jsuereth"      % "sbt-pgp"       % "2.0.1")
 addSbtPlugin("org.scoverage"     % "sbt-scoverage" % "1.6.1")
 addSbtPlugin("com.dwijnand"      % "sbt-travisci"  % "1.2.0")