Enable All Automatic Updates

<?php
// Enable automatic background updates for all components, including major core releases.
add_filter( 'automatic_updater_disabled',       '__return_false' );
add_filter( 'auto_update_core',                 '__return_true'  );
add_filter( 'allow_major_auto_core_updates',    '__return_true'  );
add_filter( 'allow_minor_auto_core_updates',    '__return_true'  );
add_filter( 'auto_update_plugin',               '__return_true'  );
add_filter( 'auto_update_theme',                '__return_true'  );
add_filter( 'auto_update_translation',          '__return_true'  );

// Reflect the enabled state in the admin UI toggles.
add_filter( 'plugins_auto_update_enabled', '__return_true' );
add_filter( 'themes_auto_update_enabled',  '__return_true' );