Update scoverage to 2.2.1 (#3777)

Pull request: #3777

Author: lefou

build.mill

@@ -165,7 +165,7 @@ object Deps {
   val scalafmtDynamic = ivy"org.scalameta::scalafmt-dynamic:3.8.3"
   def scalap(scalaVersion: String) = ivy"org.scala-lang:scalap:${scalaVersion}"
   def scalaReflect(scalaVersion: String) = ivy"org.scala-lang:scala-reflect:${scalaVersion}"
-  val scoverage2Version = "2.1.1"
+  val scoverage2Version = "2.2.1"
   val scalacScoverage2Plugin = ivy"org.scoverage:::scalac-scoverage-plugin:${scoverage2Version}"
   val scalacScoverage2Reporter = ivy"org.scoverage::scalac-scoverage-reporter:${scoverage2Version}"
   val scalacScoverage2Domain = ivy"org.scoverage::scalac-scoverage-domain:${scoverage2Version}"