Compatibility with Drush 9.3.0+

.gitignore

@@ -5,7 +5,7 @@ settings/
 wiki/
 
 # Ignore directories generated by Composer
-drush/contrib/
+drush/Commands/
 drush/sites/
 vendor/
 web/core/

composer.json

@@ -81,7 +81,7 @@
             "web/libraries/{$name}": [
                 "type:drupal-library"
             ],
-            "drush/contrib/Commands/{$name}": [
+            "drush/Commands/{$name}": [
                 "type:drupal-drush"
             ]
         },