Update to BentoBox API 1.20.

Replace plugin.yml with spigot-annotations.

Implement customizable TopLevelPanel.

pom.xml

@@ -59,7 +59,7 @@
         <powermock.version>2.0.9</powermock.version>
         <!-- More visible way how to change dependency versions -->
         <spigot.version>1.16.5-R0.1-SNAPSHOT</spigot.version>
-        <bentobox.version>1.16.5-SNAPSHOT</bentobox.version>
+        <bentobox.version>1.20.0</bentobox.version>
         <!-- Revision variable removes warning about dynamic version -->
         <revision>${build.version}-SNAPSHOT</revision>
         <!-- Do not change unless you want different name for local builds. -->
@@ -146,6 +146,11 @@
             <version>${spigot.version}</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>plugin-annotations</artifactId>
+            <version>1.2.3-SNAPSHOT</version>
+        </dependency>
         <!-- Mockito (Unit testing) -->
         <dependency>
             <groupId>org.mockito</groupId>

src/main/java/world/bentobox/level/Level.java

@@ -79,6 +79,10 @@ public void onLoad() {
     private boolean loadSettings() {
         // Load settings again to get worlds
         settings = configObject.loadConfigObject();
+
+        // Save existing panels.
+        this.saveResource("panels/top_panel.yml", false);
+
         return settings == null;
     }
 

src/main/java/world/bentobox/level/LevelPladdon.java

@@ -1,16 +1,23 @@
 package world.bentobox.level;
+
+import org.bukkit.plugin.java.annotation.dependency.Dependency;
+import org.bukkit.plugin.java.annotation.plugin.ApiVersion;
+import org.bukkit.plugin.java.annotation.plugin.Plugin;
+
 import world.bentobox.bentobox.api.addons.Addon;
 import world.bentobox.bentobox.api.addons.Pladdon;
 
+
 /**
  * @author tastybento
  *
  */
+@Plugin(name="Pladdon", version="1.0")
+@ApiVersion(ApiVersion.Target.v1_16)
+@Dependency(value = "BentoBox")
 public class LevelPladdon extends Pladdon {
-
     @Override
     public Addon getAddon() {
         return new Level();
     }
-
 }

src/main/java/world/bentobox/level/commands/IslandTopCommand.java

@@ -5,6 +5,8 @@
 import world.bentobox.bentobox.api.commands.CompositeCommand;
 import world.bentobox.bentobox.api.user.User;
 import world.bentobox.level.Level;
+import world.bentobox.level.panels.TopLevelPanel;
+
 
 public class IslandTopCommand extends CompositeCommand {
 
@@ -24,7 +26,7 @@ public void setup() {
 
     @Override
     public boolean execute(User user, String label, List<String> list) {
-        addon.getManager().getGUI(getWorld(), user);
+        TopLevelPanel.openPanel(this.addon, user, this.getWorld(), this.getPermissionPrefix());
         return true;
     }
 }