Your requirements could not be resolved to an installable set of packages. Problem 1 - behat/behat v3.1.0 requires symfony/console ~2.1|~3.0 -> found symfony/console[v2.1.0, ..., v2.8.52, v3.0.0, ..., v3.4.47] but these were not loaded, likely because it conflicts with another require. - behat/behat[v3.2.0, ..., v3.4.1] require symfony/console ~2.5||~3.0 -> found symfony/console[v2.5.0, ..., v2.8.52, v3.0.0, ..., v3.4.47] but these were not loaded, likely because it conflicts with another require. - behat/behat[v3.4.2, ..., v3.4.3] require symfony/console ~2.5||~3.0||~4.0 -> found symfony/console[v2.5.0, ..., v2.8.52, v3.0.0, ..., v3.4.47, v4.0.0, ..., v4.4.49] but these were not loaded, likely because it conflicts with another require. - behat/behat v3.5.0 requires symfony/console ~2.7.40||^2.8.33||~3.3.15||^3.4.3||^4.0.3 -> found symfony/console[v2.7.40, ..., v2.8.52, v3.3.15, ..., v3.4.47, v4.0.3, ..., v4.4.49] but these were not loaded, likely because it conflicts with another require. - behat/behat[3.6.0, ..., v3.7.0] require symfony/console ^2.7.51 || ^2.8.33 || ^3.3.15 || ^3.4.3 || ^4.0.3 || ^5.0 -> found symfony/console[v2.7.51, ..., v2.8.52, v3.3.15, ..., v3.4.47, v4.0.3, ..., v4.4.49, v5.0.0, ..., v5.4.32] but these were not loaded, likely because it conflicts with another require. - behat/behat[v3.8.0, ..., v3.8.1] require symfony/console ^4.4 || ^5.0 -> found symfony/console[v4.4.0, ..., v4.4.49, v5.0.0, ..., v5.4.32] but these were not loaded, likely because it conflicts with another require. - behat/behat[v3.9.0, ..., v3.13.0] require symfony/console ^4.4 || ^5.0 || ^6.0 -> found symfony/console[v4.4.0, ..., v4.4.49, v5.0.0, ..., v5.4.32, v6.0.0, ..., v6.4.1] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires behat/behat ^3.1 -> satisfiable by behat/behat[v3.1.0, ..., v3.13.0].