Set automatic updates for WordPress site.

auto-update-filters.php

<?php

/* Copy the Content Below this line - DO NOT INCLUDE THE <?php ABOVE */

//-----------------------------------------------------
// Set Automatic Updates for Your Site
//-----------------------------------------------------
add_filter( 'allow_major_auto_core_updates', '__return_true' ); // automatic WordPress major updates
add_filter( 'auto_update_theme', '__return_true' ); // automatic theme updates
add_filter( 'auto_update_plugin', '__return_true' ); // automatic plugin updates
add_filter( 'auto_update_translation', '__return_true' ); // automatic translation file updates

//* Disable success mail notifications
function cuefox_auto_core_update_send_email ( $send, $type, $core_update, $result ) {
	if ( !empty( $type ) && $type == 'success' ) {

		return false; 
	}
//* Use default settings
	return $send; 
}
add_filter( 'auto_core_update_send_email', 'cuefox_auto_core_update_send_email', 10, 4 );