Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires yiisoft/db-mysql dev-master -> satisfiable by yiisoft/db-mysql[dev-master]. - yiisoft/db-mysql dev-master requires yiisoft/db dev-master -> found yiisoft/db[dev-master] but it does not match your minimum-stability.

Process completed with exit code 2.

The job was canceled because "_8_2" failed.

The operation was canceled.