The job was canceled because "_8_2_highest" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires infection/infection ^0.29.0 -> satisfiable by infection/infection[0.29.0, ..., 0.29.11]. - Root composer.json requires thecodingmachine/safe ^3 -> satisfiable by thecodingmachine/safe[v3.0.0]. - infection/infection[0.29.10, ..., 0.29.11] require shish/safe ^2.6 -> satisfiable by shish/safe[v2.6.0, ..., v2.6.4]. - infection/infection[0.29.0, ..., 0.29.8] require thecodingmachine/safe ^2.1.2 -> satisfiable by shish/safe[v2.6.0, ..., v2.6.4]. - infection/infection 0.29.9 requires thecodingmachine/safe dev-master as 2.5.0 -> found thecodingmachine/safe[dev-master] but it does not match your minimum-stability. - Only one of these can be installed: shish/safe[v2.6.0, ..., v2.6.4], thecodingmachine/safe[v3.0.0]. shish/safe replaces thecodingmachine/safe and thus cannot coexist with it.

The process '/usr/local/bin/composer' failed with exit code 2