Your requirements could not be resolved to an installable set of packages. Problem 1 - sylius/sylius[v1.13.0, ..., v1.13.6] require symfony/webpack-encore-bundle ^1.15 -> found symfony/webpack-encore-bundle[v1.15.0, ..., v1.17.2] but it conflicts with your root composer.json require (^2.1). - Root composer.json requires sylius/sylius ^1.13 -> satisfiable by sylius/sylius[v1.13.0, ..., v1.13.6].

Process completed with exit code 2.