Fix optional enforcesSecureChat in ServerStatusInfo (#762)

src/main/java/com/github/steveice10/mc/protocol/data/status/ServerStatusInfo.java

@@ -6,6 +6,7 @@
 import lombok.NonNull;
 import lombok.Setter;
 import net.kyori.adventure.text.Component;
+import org.jetbrains.annotations.Nullable;
 
 @Data
 @Setter(AccessLevel.NONE)
@@ -15,5 +16,5 @@ public class ServerStatusInfo {
     private @NonNull PlayerInfo playerInfo;
     private @NonNull Component description;
     private byte[] iconPng;
-    private boolean enforcesSecureChat;
+    private @Nullable Boolean enforcesSecureChat;
 }

src/main/java/com/github/steveice10/mc/protocol/packet/status/clientbound/ClientboundStatusResponsePacket.java

@@ -54,7 +54,10 @@ public ClientboundStatusResponsePacket(ByteBuf in, MinecraftCodecHelper helper)
             icon = this.stringToIcon(obj.get("favicon").getAsString());
         }
 
-        boolean enforcesSecureChat = obj.get("enforcesSecureChat").getAsBoolean();
+        Boolean enforcesSecureChat = null;
+        if (obj.has("enforcesSecureChat")) {
+            enforcesSecureChat = obj.get("enforcesSecureChat").getAsBoolean();
+        }
         this.info = new ServerStatusInfo(version, players, description, icon, enforcesSecureChat);
     }
 
@@ -85,7 +88,9 @@ public void serialize(ByteBuf out, MinecraftCodecHelper helper) throws IOExcepti
         if (this.info.getIconPng() != null) {
             obj.addProperty("favicon", this.iconToString(this.info.getIconPng()));
         }
-        obj.addProperty("enforcesSecureChat", this.info.isEnforcesSecureChat());
+        if (this.info.getEnforcesSecureChat() != null) {
+            obj.addProperty("enforcesSecureChat", this.info.getEnforcesSecureChat());
+        }
 
         helper.writeString(out, obj.toString());
     }