Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires mixerapi/core dev-cakephp-5 -> satisfiable by mixerapi/core[dev-cakephp-5]. - mixerapi/core dev-cakephp-5 requires cakephp/cakephp 5.x-dev -> found cakephp/cakephp[5.x-dev] but it conflicts with your root composer.json require (5.0).

Process completed with exit code 2.