Your requirements could not be resolved to an installable set of packages. Problem 1 - wyrihaximus/async-test-utilities dev-420e779b2672c78097bc1a4cb61a3b59a018fc5b requires wyrihaximus/test-utilities ^5.5.4 || ^6 -> satisfiable by wyrihaximus/test-utilities[5.5.4, 5.5.5, 5.5.6, 5.5.7, 5.5.8, 5.6.0]. - wyrihaximus/test-utilities[5.5.6, 5.5.7, 5.5.8, 5.6.0] require phpunit/phpunit ^9.6.10 -> satisfiable by phpunit/phpunit[9.6.10, 9.6.11, 9.6.12, 9.6.13, 9.6.14, 9.6.15, 9.6.16, 9.6.17, 9.6.18]. - wyrihaximus/test-utilities[5.5.4, 5.5.5] require phpunit/phpunit ^9.6.9 -> satisfiable by phpunit/phpunit[9.6.9, 9.6.10, 9.6.11, 9.6.12, 9.6.13, 9.6.14, 9.6.15, 9.6.16, 9.6.17, 9.6.18]. - You can only install one version of a package, so only one of these can be installed: phpunit/phpunit[9.0.0, 9.0.1, 9.0.2, 9.1.0, 9.1.1, 9.1.2, 9.1.3, 9.1.4, 9.1.5, 9.2.0, 9.2.1, 9.2.2, 9.2.3, 9.2.4, 9.2.5, 9.2.6, 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4, 9.3.5, 9.3.6, 9.3.7, 9.3.8, 9.3.9, 9.3.10, 9.3.11, 9.4.0, 9.4.1, 9.4.2, 9.4.3, 9.4.4, 9.5.0, 9.5.1, 9.5.2, 9.5.3, 9.5.4, 9.5.5, 9.5.6, 9.5.7, 9.5.8, 9.5.9, 9.5.10, 9.5.11, 9.5.12, 9.5.13, 9.5.14, 9.5.16, 9.5.17, 9.5.18, 9.5.19, 9.5.20, 9.5.21, 9.5.22, 9.5.23, 9.5.24, 9.5.25, 9.5.26, 9.5.27, 9.5.28, 9.6.0, 9.6.1, 9.6.2, 9.6.3, 9.6.4, 9.6.5, 9.6.6, 9.6.7, 9.6.8, 9.6.9, 9.6.10, 9.6.11, 9.6.12, 9.6.13, 9.6.14, 9.6.15, 9.6.16, 9.6.17, 9.6.18, 10.1.0, 10.1.1, 10.1.2, 10.1.3, 10.2.0, 10.2.1, 10.2.2, 10.2.3, 10.2.4, 10.2.5, 10.2.6, 10.2.7, 10.3.0, 10.3.1, 10.3.2, 10.3.3, 10.3.4, 10.3.5, 10.4.0, 10.4.1, 10.4.2, 10.5.0, 10.5.1, 10.5.2, 10.5.3, 10.5.4, 10.5.5, 10.5.6, 10.5.7, 10.5.8, 10.5.9, 10.5.10, 10.5.11, 10.5.12, 10.5.13, 10.5.14, 10.5.15, 10.5.16, 11.0.0, 11.0.1, 11.0.2, 11.0.3, 11.0.4, 11.0.5, 11.0.6, 11.0.7, 11.0.8, 11.0.9]. - wyrihaximus/async-test-utilities dev-420e779b2672c78097bc1a4cb61a3b59a018fc5b requires phpunit/phpunit ^11.0.9 -> satisfiable by phpunit/phpunit[11.0.9]. - Root composer.json requires wyrihaximus/async-test-utilities dev-420e779b2672c78097bc1a4cb61a3b59a018fc5b -> satisfiable by wyrihaximus/async-test-utilities[dev-420e779b2672c78097bc1a4cb61a3b59a018fc5b].

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires wyrihaximus/async-test-utilities dev-230/merge, found wyrihaximus/async-test-utilities[dev-420e779b2672c78097bc1a4cb61a3b59a018fc5b] but it does not match the constraint.