Fix "Fatal error: Uncaught Error: Call to undefined method Pronamic\W…

…ordPress\Pay\Fields\SelectFieldOption::render()" (method has been removed in pronamic/wp-pay-core@519532b).

src/Tags/IssuerTag.php

@@ -94,7 +94,7 @@ public function handler( $tag ) {
 		$html_options = '';
 
 		foreach ( $issuer_field->get_options() as $option ) {
-			$html_options .= $option->render();
+			$html_options .= $option->get_element()->render();
 		}
 
 		$html = \sprintf(