fix: Incorrect type in ParseObject.fetch parameter options (#2726)

Author: swittk

src/ParseObject.ts

@@ -1250,7 +1250,7 @@ class ParseObject<T extends Attributes = Attributes> {
    * @returns {Promise} A promise that is fulfilled when the fetch
    *     completes.
    */
-  fetch(options: FetchOptions): Promise<this> {
+  fetch(options?: FetchOptions): Promise<this> {
     const fetchOptions = ParseObject._getRequestOptions(options);
     const controller = CoreManager.getObjectController();
     return controller.fetch(this, true, fetchOptions) as Promise<this>;

types/ParseObject.d.ts

@@ -448,7 +448,7 @@ declare class ParseObject<T extends Attributes = Attributes> {
      * @returns {Promise} A promise that is fulfilled when the fetch
      *     completes.
      */
-    fetch(options: FetchOptions): Promise<this>;
+    fetch(options?: FetchOptions): Promise<this>;
     /**
      * Fetch the model from the server. If the server's representation of the
      * model differs from its current attributes, they will be overriden.