Deprecation Warning for extract with Scala 3

[kwalcock]

json4s version 4.0.3, 4.1.0-M1

scala version 3.1.0

jdk version 1.8.0_181

What can be done about these warnings that appear for any use of extract?

[warn] -- Deprecation Warning: ...\serialization\json\JSONSerializer.scala:76:51
[warn] 76 |    val graphs = (json \ "graphs").extract[JObject].obj.map { case (key, json) =>
[warn]    |                                                   ^
[warn]    |Compiler synthesis of Manifest and OptManifest is deprecated, instead
[warn]    |replace with the type `scala.reflect.ClassTag[org.json4s.JObject]`.
[warn]    |Alternatively, consider using the new metaprogramming features of Scala 3,
[warn]    |see https://docs.scala-lang.org/scala3/reference/metaprogramming.html

[awwsmm]

Seeing the same with json4s-native 4.0.5, Scala 3.1.3, and Java 17.0.3-zulu

[chitralverma]

any workaround for this ?

CC @xuwei-k