Run Mill 0.12 with --ticker=false

Closes: scala-steward-org/mill-plugin#64

Author: fthomas

build.sbt

@@ -446,6 +446,7 @@ runSteward := Def.taskDyn {
     Seq("--git-ask-pass", s"$home/.github/askpass/$gitHubLogin.sh"),
     // Seq("--github-app-id", IO.read(gitHubAppDir / "scala-steward.app-id.txt").trim),
     // Seq("--github-app-key-file", s"$gitHubAppDir/scala-steward.private-key.pem"),
+    Seq("--repo-config", s"$projectDir/.scala-steward.conf"),
     Seq("--whitelist", s"$home/.cache/coursier"),
     Seq("--whitelist", s"$home/.cache/JNA"),
     Seq("--whitelist", s"$home/.cache/mill"),

modules/core/src/main/scala/org/scalasteward/core/buildtool/mill/MillAlg.scala

@@ -46,8 +46,9 @@ final class MillAlg[F[_]](defaultResolver: Resolver)(implicit
       )
 
   private def runMill(buildRootDir: File) = {
-    val command =
-      Nel("mill", List("--no-server", "--import", cliPluginCoordinate, "show", extractDeps))
+    val options =
+      List("--no-server", "--ticker=false", "--import", cliPluginCoordinate, "show", extractDeps)
+    val command = Nel("mill", options)
     processAlg.execSandboxed(command, buildRootDir)
   }
   private def runMillUnder011(buildRootDir: File, millBuildVersion: Option[Version]) = {

modules/core/src/test/scala/org/scalasteward/core/buildtool/mill/MillAlgTest.scala

@@ -40,6 +40,7 @@ class MillAlgTest extends FunSuite {
       repoDir,
       "mill",
       "--no-server",
+      "--ticker=false",
       "--import",
       "ivy:org.scala-steward::scala-steward-mill-plugin::0.18.0",
       "show",