Reproduce the problems with Jackson serializer about akka-serialization-helper

[PawelLipski]

I suggest toying with akka.actor.testkit.typed.scaladsl.SerializationTestKit to reproduce some of the runtime errors one can encounter with Jackson.

The simplest repro would be sth like:

trait Foo
case class Bar(foo: Foo)

val testKit: ActorTestKit = ActorTestKit()
val system: ActorSystem[Nothing] = testKit.system
val serializationTestKit = new SerializationTestKit(system)
serializationTestKit.verify(Bar(new Foo {})) // will likely fail since Foo is an abstract type without `@JsonSubType` annotation

[PawelLipski]

Some of the necessary/useful dependencies:

"com.typesafe.akka"             %% "akka-serialization-jackson"        % "2.6.10"
"com.typesafe.akka"             %% "akka-actor-testkit-typed"          % "2.6.10"
"com.beachape"                  %% "enumeratum"                        % "1.6.1"
"com.tngtech.archunit"           % "archunit"                          % "0.14.1"