message: Add createDirectory
diff: @@ -100,6 +100,19 @@ declare class FilePicker extends Application {
  options: object
  ): Promise<boolean>;
  + /**
  + * Create a subdirectory within a given source. The requested subdirectory path must not already exist.
  + * @param {string} source The source location in which to browse. See FilePicker#sources for details
  + * @param {string} target The target within the source location
  + * @param {Object} options Optional arguments which modify the request
  + * @return {Promise<Object>}
  + */
  + static createDirectory(
  + source: string,
  + target: string,
  + options: object
  + ) : Promise<object>;
  +
  /**
  * Handle a drop event to support dropping files onto the file picker and automatically uploading them
  */
  