Update metrics-core, metrics-healthchecks to 4.2.30 (#569)

Author: scala-steward

build.sbt

@@ -63,8 +63,8 @@ lazy val metricsScala = project
     name := "metrics4-scala",
     description := "metrics-scala for Scala " + CrossVersion.binaryScalaVersion(scalaVersion.value),
     libraryDependencies ++= Seq(
-      "io.dropwizard.metrics" % "metrics-core" % "4.2.29",
-      "io.dropwizard.metrics" % "metrics-healthchecks" % "4.2.29"
+      "io.dropwizard.metrics" % "metrics-core" % "4.2.30",
+      "io.dropwizard.metrics" % "metrics-healthchecks" % "4.2.30"
     ),
     mimaPreviousArtifacts := mimaPrevious(name.value, scalaVersion.value)
 )