Update play-json to 2.10.4

build.sc

@@ -225,7 +225,7 @@ object ujson extends Module{
   object play extends Cross[PlayModule](scala2JVMVersions)
   trait PlayModule extends CommonPublishModule{
     def moduleDeps = Seq(ujson.jvm())
-    val playJsonVersion = "2.9.4"
+    val playJsonVersion = "2.10.4"
     def ivyDeps = Agg(ivy"com.typesafe.play::play-json:$playJsonVersion")
   }
 }
@@ -384,7 +384,7 @@ trait BenchModule extends CommonPlatformModule{
     ivy"io.circe::circe-core::0.14.5",
     ivy"io.circe::circe-generic::0.14.5",
     ivy"io.circe::circe-parser::0.14.5",
-    ivy"com.typesafe.play::play-json::2.9.4",
+    ivy"com.typesafe.play::play-json::2.10.4",
     ivy"io.argonaut::argonaut:6.2.6",
     ivy"org.json4s::json4s-ast:3.6.12",
     ivy"com.lihaoyi::sourcecode::$sourcecode",