Ruleset: add tests for handling of `php[cs|cbf]-only` attributes within a `<ruleset>`#711

jrfnl merged 3 commits intomasterPHPCSStandards/PHP_CodeSniffer:masterfrom

feature/ruleset-add-tests-for-handling-phpcs-phpcbf-only-ruleset-levelPHPCSStandards/PHP_CodeSniffer:feature/ruleset-add-tests-for-handling-phpcs-phpcbf-only-ruleset-levelCopy head branch name to clipboard