Update to Scala 2.13 & Akka 2.6.5 (#461)

* update scala to 2.13 & update dependencies

* fix test

* import scodec-akka

* scala 2.13 fixes

* Work around futures not completing when awaited within object constructor

Co-authored-by: Mazo <mazo2@hotmail.com>

common/src/main/java/scodec/interop/akka/PrivacyHelper.java

@@ -0,0 +1,13 @@
+package scodec.interop.akka;
+
+import java.nio.ByteBuffer;
+
+import akka.util.ByteString.ByteString1C;
+
+interface PrivacyHelper {
+
+    static ByteString1C createByteString1C(byte[] array) {
+        return new ByteString1C(array);
+    }
+
+}

common/src/main/scala/scodec/interop/akka/package.scala

@@ -0,0 +1,16 @@
+package scodec.interop
+
+import scodec.bits.ByteVector
+
+import _root_.akka.util.ByteString
+
+package object akka {
+
+  implicit class EnrichedByteString(val value: ByteString) extends AnyVal {
+    def toByteVector: ByteVector = ByteVector.viewAt((idx: Long) => value(idx.toInt), value.size.toLong)
+  }
+
+  implicit class EnrichedByteVector(val value: ByteVector) extends AnyVal {
+    def toByteString: ByteString = PrivacyHelper.createByteString1C(value.toArray)
+  }
+}

common/src/main/scala/services/teamwork/SquadService.scala

@@ -10,6 +10,7 @@ import net.psforever.objects.zones.Zone
 import net.psforever.packet.game._
 import net.psforever.types._
 import services.{GenericEventBus, Service}
+import services.teamwork.SquadAction
 
 import scala.collection.concurrent.TrieMap
 import scala.collection.mutable

common/src/main/scala/services/teamwork/SquadServiceResponse.scala

@@ -5,6 +5,7 @@ import net.psforever.objects.teamwork.Squad
 import net.psforever.packet.game._
 import net.psforever.types.{PlanetSideGUID, SquadResponseType, SquadWaypoints}
 import services.GenericEventBusMsg
+import services.teamwork.SquadAction
 
 final case class SquadServiceResponse(toChannel : String, exclude : Iterable[Long], response : SquadResponse.Response) extends GenericEventBusMsg
 

common/src/test/scala/objects/ZoneTest.scala

@@ -41,7 +41,7 @@ class ZoneTest extends Specification {
 
     "associates objects to bases (doesn't check numbers)" in {
       val map = new ZoneMap("map13")
-      map.ObjectToBuilding mustEqual Nil
+      map.ObjectToBuilding mustEqual Map.empty
       map.ObjectToBuilding(1, 2)
       map.ObjectToBuilding mustEqual Map(1 -> 2)
       map.ObjectToBuilding(3, 4)