Update sbt-scoverage to 1.9.0 (#209)

Author: scala-steward

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("com.eed3si9n"        % "sbt-assembly"   % "1.0.0")
 addSbtPlugin("com.eed3si9n"        % "sbt-buildinfo"  % "0.10.0")
 addSbtPlugin("com.geirsson"        % "sbt-ci-release" % "1.5.7")
-addSbtPlugin("org.scoverage"       % "sbt-scoverage"  % "1.8.2")
+addSbtPlugin("org.scoverage"       % "sbt-scoverage"  % "1.9.0")
 addSbtPlugin("ch.epfl.scala"       % "sbt-scalafix"   % "0.9.30")
 addSbtPlugin("org.scalameta"       % "sbt-scalafmt"   % "2.4.3")
 addSbtPlugin("com.beautiful-scala" % "sbt-scalastyle" % "1.5.0")