Updated kotlin to 1.8.0

Updated kotlin target to java 11
Fixed build errors when targeting 1.8.0

Server/src/main/core/net/packet/PacketProcessor.kt

@@ -297,6 +297,7 @@ object PacketProcessor {
                 //TODO see above todo
 
             }
+            else -> {}
         }
     }
 

Server/src/main/core/net/packet/in/Decoders530.kt

@@ -709,6 +709,7 @@ enum class Decoders530(val opcode: Int) {
                     selection_b_index = buffer.get()
                 }
                 QCPacketType.UNHANDLED -> SystemLogger.logWarn(this::class.java, "Unhandled packet type, skipping remaining buffer contents.")
+                else -> {}
             }
             return Packet.QuickChat(player, selection_a_index, selection_b_index, forClan, multiplier, offset, packetType)
         }

Server/src/main/core/net/packet/in/QuickChatPacketHandler.kt

@@ -51,6 +51,7 @@ class QuickChatPacketHandler : IncomingPacket {
                 selection_b_index = buffer.get()
             }
             QCPacketType.UNHANDLED -> SystemLogger.logWarn(this::class.java, "Unhandled packet type, skipping remaining buffer contents.")
+            else -> {}
         }