The job was canceled because "_8_0" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires satooshi/php-coveralls dev-master, found satooshi/php-coveralls[dev-gh-pages-bak, dev-dx_phpmd, dev-2.1_cs, 0.1.0, ..., v0.7.1, v1.0.0, v1.0.1, v1.0.2, v1.1.0, v2.0.0, ..., 2.2.x-dev] but it does not match the constraint.