Update pekko-actor, pekko-testkit to 1.1.4 (#586)

Author: scala-steward

build.sbt

@@ -94,8 +94,8 @@ lazy val metricsPekko = project
     name := "metrics4-pekko",
     description := "metrics-scala for pekko 1.0 and Scala " + CrossVersion.binaryScalaVersion(scalaVersion.value),
     libraryDependencies ++= Seq(
-      "org.apache.pekko" %% "pekko-actor" % "1.1.3",
-      "org.apache.pekko" %% "pekko-testkit" % "1.1.3" % Test
+      "org.apache.pekko" %% "pekko-actor" % "1.1.4",
+      "org.apache.pekko" %% "pekko-testkit" % "1.1.4" % Test
     ),
     sourceDirectory := baseDirectory.value.getParentFile / "metrics-pekko" / "src",
     mimaPreviousArtifacts := Set("nl.grons" %% "metrics4-pekko" % "4.3.2")