The job was canceled because "_8_1_6_3___max_direct__0_" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - vimeo/psalm dev-master requires nikic/php-parser ^5.0.0 -> found nikic/php-parser[dev-master, v5.0.0alpha1, ..., 5.0.x-dev (alias of dev-master)] but it conflicts with your root composer.json require (^4.2). - vimeo/psalm 6.x-dev is an alias of vimeo/psalm dev-master and thus requires it to be installed too. - Root composer.json requires vimeo/psalm 6.x-dev -> satisfiable by vimeo/psalm[6.x-dev (alias of dev-master)]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.