1.Put site into maintenance mode: /admin/config/development/maintenance
2.Run this command in the root of the site remove conposer.json on core folder:
rm -rf core/composer.json
- Open file : composer.json . add code “drupal/core”: “^8.6” in section “require”
“require”: { “drupal/core”: “^8.6”,}
it will auto pull latest of version 8.6
3.1 . add line below to file composer.json .
composer require commerceguys/intl: ~0.7
composer require composer require twig/twig:1.38.2
4.Run this command in the root of the site:
php72 /bin/composer update drupal/core --with-dependencies
4.1 : Run command line :
composer require drupal/address
5.Go to /update.php (or drush updb) and run the updates.
Note: Backup source code and database.