Update sbt-scoverage to 1.6.1

Author: scala-steward

project/plugins.sbt

@@ -3,5 +3,5 @@ addSbtPlugin("org.scalameta"     % "sbt-scalafmt"  % "2.2.1")
 addSbtPlugin("org.xerial.sbt"    % "sbt-sonatype"  % "3.8")
 addSbtPlugin("com.github.gseitz" % "sbt-release"   % "1.0.12")
 addSbtPlugin("com.jsuereth"      % "sbt-pgp"       % "2.0.0")
-addSbtPlugin("org.scoverage"     % "sbt-scoverage" % "1.6.0")
+addSbtPlugin("org.scoverage"     % "sbt-scoverage" % "1.6.1")
 addSbtPlugin("com.dwijnand"      % "sbt-travisci"  % "1.2.0")