Fix optional from_pretrained types (#1352)

Author: xenova

src/base/feature_extraction_utils.js

@@ -31,7 +31,7 @@ export class FeatureExtractor extends Callable {
      * 
      * @returns {Promise<FeatureExtractor>} A new instance of the Feature Extractor class.
      */
-    static async from_pretrained(pretrained_model_name_or_path, options) {
+    static async from_pretrained(pretrained_model_name_or_path, options={}) {
         const config = await getModelJSON(pretrained_model_name_or_path, FEATURE_EXTRACTOR_NAME, true, options);
         return new this(config);
     }

src/base/image_processors_utils.js

@@ -1098,7 +1098,7 @@ export class ImageProcessor extends Callable {
      * 
      * @returns {Promise<ImageProcessor>} A new instance of the Processor class.
      */
-    static async from_pretrained(pretrained_model_name_or_path, options) {
+    static async from_pretrained(pretrained_model_name_or_path, options={}) {
         const preprocessorConfig = await getModelJSON(pretrained_model_name_or_path, IMAGE_PROCESSOR_NAME, true, options);
         return new this(preprocessorConfig);
     }

src/base/processing_utils.js

@@ -148,7 +148,7 @@ export class Processor extends Callable {
      * 
      * @returns {Promise<Processor>} A new instance of the Processor class.
      */
-    static async from_pretrained(pretrained_model_name_or_path, options) {
+    static async from_pretrained(pretrained_model_name_or_path, options={}) {
 
         const [config, components, chat_template] = await Promise.all([
             // TODO: