Update sbt-scoverage to 2.4.4 (#246)

Author: scala-steward

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("com.evolution" % "sbt-artifactory-plugin" % "0.0.2")
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.4.1")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.4.4")
 addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.15")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.5")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.14.4")