def update(file_path, list_type, operation = 'ADD')
      upload = TwitterAds::TONUpload.new(account.client, file_path)
      update_audience(self, upload.perform, list_type, operation)
      reload!
    end
def update(file_path, list_type, operation = 'ADD')
      upload = TwitterAds::TONUpload.new(account.client, file_path)
      update_audience(self, upload.perform, list_type, operation)
      reload!
    end
Updates the current tailored audience instance.

 @example
   audience = account.tailored_audiences('xyz')
   audience.update('/path/to/file', 'EMAIL', 'REPLACE')

 @param file_path [String] The path to the file to be uploaded.
 @param list_type [String] The tailored audience list type.
 @param operation [String] The update operation type (Default: 'ADD').

 @since 0.3.0

 @return [TailoredAudience] [description]