Merge pull request #460 from scala-steward/update/sbt-ci-release-1.5.10

Update sbt-ci-release to 1.5.10

Author: mergify[bot]

project/plugins.sbt

@@ -2,4 +2,4 @@ addSbtPlugin("org.scala-js"   % "sbt-scalajs"    % "1.8.0")
 addSbtPlugin("org.scalameta"  % "sbt-scalafmt"   % "2.4.6")
 addSbtPlugin("com.github.sbt" % "sbt-release"    % "1.1.0")
 addSbtPlugin("org.scoverage"  % "sbt-scoverage"  % "1.9.3")
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.9")
+addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.10")