Update pekko-stream to 1.4.0 (#2744)

Author: softwaremill-ci

build.sbt

@@ -141,7 +141,7 @@ val akkaStreamVersion = "2.6.20"
 val akkaStreams = "com.typesafe.akka" %% "akka-stream" % akkaStreamVersion
 
 val pekkoHttp = "org.apache.pekko" %% "pekko-http" % "1.2.0"
-val pekkoStreamVersion = "1.3.0"
+val pekkoStreamVersion = "1.4.0"
 val pekkoStreams = "org.apache.pekko" %% "pekko-stream" % pekkoStreamVersion
 
 val scalaTest = libraryDependencies ++= Seq("freespec", "funsuite", "flatspec", "wordspec", "shouldmatchers").map(m =>