Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires squizlabs/php_codesniffer dev-master, found squizlabs/php_codesniffer[dev-feature/endtoendtests-fix-fixture-methods, dev-TEST/ghactions-revert-code-coverage-php-version, dev-feature/ghactions-test-against-libxml-2.14, dev-dependabot/github_actions/3.x/peter-evans/repository-dispatch-4.0.0, dev-feature/3.x-metrics-for-switch-statements, dev-feature/3769-improve-todo-fixme-sniffs, dev-feature/psr2-namespacedeclaration-bow-out-on-php-close-tag, 1.4.2, ..., 1.5.x-dev, 2.0.0a1, ..., 2.9.x-dev, 3.0.0a1, ..., 3.x-dev, 4.0.0beta1, 4.0.0-RC1, 4.0.0, 4.x-dev] but it does not match the constraint. Problem 2 - Root composer.json requires wp-coding-standards/wpcs ^3.2.0 -> satisfiable by wp-coding-standards/wpcs[3.2.0]. - wp-coding-standards/wpcs 3.2.0 requires squizlabs/php_codesniffer ^3.13.0 -> found squizlabs/php_codesniffer[3.13.0, ..., 3.x-dev] but it conflicts with your root composer.json require (dev-master). Problem 3 - Root composer.json requires phpcompatibility/php-compatibility ^9 -> satisfiable by phpcompatibility/php-compatibility[9.0.0, ..., 9.3.5]. - phpcompatibility/php-compatibility[9.0.0, ..., 9.3.5] require squizlabs/php_codesniffer ^2.3 || ^3.0.2 -> found squizlabs/php_codesniffer[2.3.0, ..., 2.9.x-dev, 3.0.2, ..., 3.x-dev] but it conflicts with your root composer.json require (dev-master). Problem 4 - Root composer.json requires phpcsstandards/phpcsdevtools ^1.2.3 -> satisfiable by phpcsstandards/phpcsdevtools[1.2.3]. - phpcsstandards/phpcsdevtools 1.2.3 requires squizlabs/php_codesniffer ^3.1.0 || ^4.0 -> found squizlabs/php_codesniffer[3.1.0, ..., 3.x-dev, 4.0.0beta1, 4.0.0-RC1, 4.0.0, 4.x-dev] but it conflicts with your root composer.json require (dev-master). Problem 5 - Root composer.json requires phpcsstandards/phpcsextra ^1.4.0 -> satisfiable by phpcsstandards/phpcsextra[1.4.0, 1.4.1]. - phpcsstandards/phpcsextra 1.4.0 requires squizlabs/php_codesniffer ^3.13.0 || ^4.0 -> found squizlabs/php_codesniffer[3.13.0, ..., 3.x-dev, 4.0.0beta1, 4.0.0-RC1, 4.0.0, 4.x-dev] but it conflicts with your root composer.json require (dev-master). - phpcsstandards/phpcsextra 1.4.1 requires squizlabs/php_codesniffer ^3.13.4 || ^4.0 -> found squizlabs/php_codesniffer[3.13.4, 3.x-dev, 4.0.0beta1, 4.0.0-RC1, 4.0.0, 4.x-dev] but it conflicts with your root composer.json require (dev-master).