feat: use instead of

Signed-off-by: ItsNeil17 <neil@willofsteel.me>

# Conflicts:
#	.idea/workspace.xml

src/main/java/dev/hytalemodding/commands/ExampleCommand.java

@@ -1,19 +1,24 @@
 package dev.hytalemodding.commands;
 
 import com.hypixel.hytale.server.core.Message;
+import com.hypixel.hytale.server.core.command.system.AbstractCommand;
 import com.hypixel.hytale.server.core.command.system.CommandContext;
-import com.hypixel.hytale.server.core.command.system.basecommands.CommandBase;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.concurrent.CompletableFuture;
 
-public class ExampleCommand extends CommandBase {
+public class ExampleCommand extends AbstractCommand {
 
     public ExampleCommand(String name, String description) {
         super(name, description);
     }
 
+    @Nullable
     @Override
-    protected void executeSync(@Nonnull CommandContext context) {
+    protected CompletableFuture<Void> execute(@Nonnull CommandContext context) {
         context.sendMessage(Message.raw("Hello from ExampleCommand!"));
+        return CompletableFuture.completedFuture(null);
     }
+
 }