preview images dans l'éditeur

assets/controllers/easymde_controller.js

@@ -20,8 +20,7 @@ export default class extends Controller {
             imageUploadEndpoint: basePath + '/upload-image',
             imagePathAbsolute: false,
             imageMaxSize: 1024 * 1024 * 100,
-            imagePreviewInEditor: true,
-            imagesPreviewHandler: true
+            previewImagesInEditor: true,
         });