Update sbt-ci-release to 1.5.7

Author: scala-steward

project/plugins.sbt

@@ -1,6 +1,6 @@
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.10.0")
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.15.0")
-addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.5")
+addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.7")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.3.0")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.20.0")
 addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.5.3")