Merge pull request #3416 from Multiverse/chore/logging

Add a logging message when plugin shutdown

Author: benwoo1110

src/main/java/org/mvplugins/multiverse/core/MultiverseCore.java

@@ -126,6 +126,7 @@ public void onDisable() {
         MultiverseCoreApi.shutdown();
         shutdownDependencyInjection();
         PluginServiceLocatorFactory.get().shutdown();
+        Logging.info("- Disabled");
         Logging.shutdown();
     }