Add new fixers/sniffs

[OndraM]

As part of upgrade of Symplify, php-cs-fixer and PHP_CodeSniffer, we can some of newly introduced fixers.

Symplify/coding-standard:

• Changelog: https://github.com/symplify/symplify/blob/master/CHANGELOG.md
• Documentation: https://github.com/symplify/coding-standard/blob/master/docs/rules_overview.md

php-cs-fixer changelog:

• Changelog: https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/2.16/CHANGELOG.md
• Sniff documentation: https://github.com/FriendsOfPHP/PHP-CS-Fixer/tree/2.16/doc/rules

PHP_CodeSniffer

• Changelog: https://github.com/squizlabs/PHP_CodeSniffer/releases