I am using Magento 2.0.5. When I run the composer update command it's showing the following warning.
Package fabpot/php-cs-fixer is abandoned, you should avoid using it. Use friends ofphp/php-cs-fixer instead.
Writing lock file
Generating autoload files
Who can help me?
It seems to be a PHP code style error. The PHP Coding Standards Fixer tool fixes most issues in your code when you want to follow the PHP coding standards as defined in the PSR-1 and PSR-2 documents and many more. Maybe you can try PHP-CS-Fixer to fix up your PHP code. I am not sure because I found some reviews. However, testing is with hope. On the other hand, you perhaps seek help Magento upgrade 2.1 extension to start again.