Make MiMa happy

Author: ybasket

build.sbt

@@ -72,7 +72,9 @@ lazy val playJson = crossProject(JSPlatform, JVMPlatform)
   .crossType(CrossType.Full)
   .in(file("playJson"))
   .settings(commonSettings: _*)
-  .settings(name := "diffson-play-json", libraryDependencies += "com.typesafe.play" %%% "play-json" % "2.10.0-RC6")
+  .settings(name := "diffson-play-json",
+            libraryDependencies += "com.typesafe.play" %%% "play-json" % "2.10.0-RC6",
+            tlVersionIntroduced := Map("3" -> "4.3.0"))
   .dependsOn(core, testkit % Test)
 
 val circeVersion = "0.14.3"