Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-core 4.11.x-dev requires silverstripe/framework 4.11.x-dev -> found silverstripe/framework[4.11.x-dev] but it conflicts with your root composer.json require (^4.13.18). - silverstripe/installer 4.11.x-dev requires silverstripe/recipe-cms 4.11.x-dev -> satisfiable by silverstripe/recipe-cms[4.11.x-dev]. - silverstripe/recipe-cms 4.11.x-dev requires silverstripe/recipe-core 4.11.x-dev -> satisfiable by silverstripe/recipe-core[4.11.x-dev]. - Root composer.json requires silverstripe/installer 4.11.x-dev -> satisfiable by silverstripe/installer[4.11.x-dev].

Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-core 4.10.x-dev requires silverstripe/framework 4.10.x-dev -> found silverstripe/framework[4.10.x-dev] but it conflicts with your root composer.json require (^4.13.18). - silverstripe/installer 4.10.x-dev requires silverstripe/recipe-cms 4.10.x-dev -> satisfiable by silverstripe/recipe-cms[4.10.x-dev]. - silverstripe/recipe-cms 4.10.x-dev requires silverstripe/recipe-core 4.10.x-dev -> satisfiable by silverstripe/recipe-core[4.10.x-dev]. - Root composer.json requires silverstripe/installer 4.10.x-dev -> satisfiable by silverstripe/installer[4.10.x-dev].

Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-core 4.9.x-dev requires silverstripe/framework 4.9.x-dev -> found silverstripe/framework[4.9.x-dev] but it conflicts with your root composer.json require (^4.13.18). - silverstripe/installer 4.9.x-dev requires silverstripe/recipe-cms 4.9.x-dev -> satisfiable by silverstripe/recipe-cms[4.9.x-dev]. - silverstripe/recipe-cms 4.9.x-dev requires silverstripe/recipe-core 4.9.x-dev -> satisfiable by silverstripe/recipe-core[4.9.x-dev]. - Root composer.json requires silverstripe/installer 4.9.x-dev -> satisfiable by silverstripe/installer[4.9.x-dev].