added missing IO

Author: sreichel

src/OpenMage/Composer/Plugin/TinyMce.php

@@ -93,7 +93,7 @@ public function process(Event $event, string $magentoRootDir): void
                     $copySource = $copySource . '/langs' . $mainVersion;
                 }
 
-                $this->copy($copySource, $magentoRootDir . $copyTarget);
+                $this->copy($io, $copySource, $magentoRootDir . $copyTarget);
             }
         }
     }
@@ -129,7 +129,7 @@ private function getTinyMceModule(Event $event, IOInterface $io, string $module)
         return null;
     }
 
-    private function copy(string $source, string $target): void
+    private function copy(IOInterface $io, string $source, string $target): void
     {
         $filesystem = new Filesystem();
         $finder = new Finder();