upgrade akka to 2.5.22 (#43)

kwark · web-flow · commit 602fb9dc0cc6 · 2019-05-05T10:31:31.000+02:00
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
@@ -2,7 +2,7 @@ import sbt._
 
 object Dependencies {
 
-  val akkaVersion     = "2.5.21"
+  val akkaVersion     = "2.5.22"
   val slickVersion    = "3.3.0"
   val gatlingVersion  = "2.2.4"
 
