Update Default Scoverage Version

Add support for Scala 2.13.1

Author: 0xRoch

src/main/scala/scoverage/ScoverageSbtPlugin.scala

@@ -11,7 +11,7 @@ object ScoverageSbtPlugin extends AutoPlugin {
   val ScalacRuntimeArtifact = "scalac-scoverage-runtime"
   val ScalacPluginArtifact = "scalac-scoverage-plugin"
   // this should match the version defined in build.sbt
-  val DefaultScoverageVersion = "1.4.0"
+  val DefaultScoverageVersion = "1.4.1"
   val autoImport = ScoverageKeys
   lazy val ScoveragePluginConfig = config("scoveragePlugin").hide