Small improvement

Hello! Thanks for your plugin.

Can you made small improvement, I have custom WP core folder, so this code broke plugin functionality.

jQuery.getJSON(
	'/wp-admin/admin-ajax.php',
	...
);

You can use code like this:

wp_localize_script( 'spwp86_script', 'ajax_object', [ 'ajax_url' => admin_url( 'admin-ajax.php' ) ] );

jQuery.getJSON(
	ajax_object.ajax_url,
	...
);