How to fix "The called constructor method for WP_Widget is deprecated since version 4.3.0!"

new functions.php

...
class My_Widget extends WP_Widget {
	
	function __construct() {
		parent::__construct(
			'my-widget', // Base ID
			'My Widget', // Name
			array( 'description' => 'My Widget description.' ) // Args
		);
	}
	
	function widget($args, $instance) {
...

old functions.php

...
class My_Widget extends WP_Widget {
	
	function My_Widget() {
		$widget_ops = array('classname' => 'my-widget', 'description' => 'My Widget description.');

		$control_ops = array('id_base' => 'my-widget');

		$this->WP_Widget('my-widget', 'My Widget', $widget_ops, $control_ops);
	}
	
	function widget($args, $instance) {
...