Run WordPress Updates, WordPress Plugin Updates, and WordPress Theme Updates Automatically

wp-config.php

<?php

/*
 * Select one or more of the options below to your wp-config.php file to have WordPress updates run automatically. 
 */

// Apply Major WordPress Updates Automatically
define( 'WP_AUTO_UPDATE_CORE', true );

// Apply Minor WordPress Updates Automatically 
define( 'WP_AUTO_UPDATE_CORE', 'minor' );

// Update *all* WordPress Plugins Automatically - Use with caution as this can have unintended consequences
add_filter( 'auto_update_plugin', '__return_true' );

// Update *all* WordPress Themes Automatically - Use with caution as this can delete any changes you have made to your theme
add_filter( 'auto_update_theme', '__return_true' );