Update sbt-scoverage to 2.0.9 (#166)

Author: paoloboni

project/plugins.sbt

@@ -4,4 +4,4 @@ addSbtPlugin("org.xerial.sbt"    % "sbt-sonatype"  % "3.9.21")
 addSbtPlugin("de.heikoseeberger" % "sbt-header"    % "5.10.0")
 addSbtPlugin("com.github.sbt"    % "sbt-release"   % "1.1.0")
 addSbtPlugin("org.typelevel"     % "sbt-tpolecat"  % "0.5.0")
-addSbtPlugin("org.scoverage"     % "sbt-scoverage" % "2.0.8")
+addSbtPlugin("org.scoverage"     % "sbt-scoverage" % "2.0.9")