Get ready for composer 2

BasePlugin.php

@@ -28,4 +28,14 @@ abstract class BasePlugin implements BasePluginInterface, PluginInterface, Event
     $this->handler = new $class($composer, $io);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function deactivate(Composer $composer, IOInterface $io) {}
+
+  /**
+   * {@inheritdoc}
+   */
+  public function uninstall(Composer $composer, IOInterface $io) {}
+
 }