Update sbt-scoverage to 1.9.3 (#199)

Author: scala-steward

project/plugins.sbt

@@ -1,4 +1,4 @@
-addSbtPlugin("org.scoverage"  % "sbt-scoverage"      % "1.9.2")
+addSbtPlugin("org.scoverage"  % "sbt-scoverage"      % "1.9.3")
 addSbtPlugin("org.scalameta"  % "sbt-scalafmt"       % "2.4.6")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release"     % "1.5.10")
 addSbtPlugin("com.codecommit" % "sbt-github-actions" % "0.14.2")