unregister listener when plugin disabled

gradle.properties

@@ -4,7 +4,7 @@ org.gradle.jvmargs=-Xmx1G
 org.gradle.parallel=true
 
 # Plugin
-plugin_version=0.1.0
+plugin_version=0.1.1
 plugin_group=xyz.twokilohertz
 plugin_base_name=playerlistdeathcount
 

src/main/java/xyz/twokilohertz/playerlistdeathcount/PlayerListDeathCount.java

@@ -1,13 +1,23 @@
 package xyz.twokilohertz.playerlistdeathcount;
 
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.Listener;
 import org.bukkit.plugin.PluginManager;
 import org.bukkit.plugin.java.JavaPlugin;
 import xyz.twokilohertz.playerlistdeathcount.listeners.PlayerEventListener;
 
 public class PlayerListDeathCount extends JavaPlugin {
+    private Listener playerEventListener;
+
     @Override
     public void onEnable() {
         PluginManager pluginManager = getServer().getPluginManager();
-        pluginManager.registerEvents(new PlayerEventListener(), this);
+        playerEventListener = new PlayerEventListener();
+        pluginManager.registerEvents(playerEventListener, this);
+    }
+
+    @Override
+    public void onDisable() {
+        HandlerList.unregisterAll(playerEventListener);
     }
 }

src/main/resources/plugin.yml

@@ -1,5 +1,5 @@
 name: PlayerListDeathCount
-version: 0.1.0
+version: 0.1.1
 description: Show the number of deaths players have in the server online player list
 author: twokilohertz
 website: https://git.2khz.xyz/adam/PlayerListDeathCount