Merge pull request #428 from scala-steward/update/play-json-3.0.4

Update play-json to 3.0.4

Author: satabin

build.sbt

@@ -74,7 +74,7 @@ lazy val playJson = crossProject(JSPlatform, JVMPlatform, NativePlatform)
   .in(file("playJson"))
   .settings(commonSettings: _*)
   .settings(name := "diffson-play-json",
-            libraryDependencies += "org.playframework" %%% "play-json" % "3.0.3",
+            libraryDependencies += "org.playframework" %%% "play-json" % "3.0.4",
             tlVersionIntroduced := Map("3" -> "4.3.0"))
   .nativeSettings(tlVersionIntroduced := Map("2.12" -> "4.5.0", "2.13" -> "4.5.0", "3" -> "4.5.0"))
   .dependsOn(core, testkit % Test)