Upgrade to Scala 2.13

build.sbt

 lazy val root = (project in file(".")).
   settings(
-    name := "future promise actor",
+    name := "cosc250assignment3",
     version := "1.0",
-    scalaVersion := "2.12.6"
+    scalaVersion := "2.13.1"
   )
 
 libraryDependencies ++= Seq(
-  "com.typesafe.akka" %% "akka-actor" % "2.5.3",
-  "com.typesafe.play" %% "play-ahc-ws-standalone" % "2.0.0-M1",
-  "com.typesafe.play" %% "play-json" % "2.6.9",
-  "org.scalactic" %% "scalactic" % "3.0.5",
-  "org.scalatest" %% "scalatest" % "3.0.5" % "test"
+  "com.typesafe.akka" %% "akka-actor" % "2.6.5",
+  "com.typesafe.akka" %% "akka-stream" % "2.6.5",
+  "com.typesafe.play" %% "play-json" % "2.8.1",
+  "org.scalactic" %% "scalactic" % "3.1.1",
+  "org.scalatest" %% "scalatest" % "3.1.1" % "test"
 )

project/build.properties

-sbt.version=0.13.11
+sbt.version=1.3.8

src/main/scala/cosc250/roboScala/ui/GameUI.scala

@@ -73,7 +73,7 @@ class GameUI(gameState: => GameState, commands: => Map[String, Set[Command]]) {
   frame.add(commandsPanel, BorderLayout.WEST)
   frame.add(startButton, BorderLayout.SOUTH)
   frame.setSize(1024, 768)
-  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
+  frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)
   frame.setVisible(true)
 
   /** Called by the game actor to request the game panel be repainted */