Your requirements could not be resolved to an installable set of packages. Problem 1 - lcobucci/content-negotiation-middleware[3.1.0, ..., 3.1.x-dev] require psr/http-message ^1.0 -> found psr/http-message[1.0, 1.0.1, 1.1] but it conflicts with your root composer.json require (^2.0.0). - lcobucci/content-negotiation-middleware 3.2.x-dev requires psr/http-message ^1.1.0 -> found psr/http-message[1.1] but it conflicts with your root composer.json require (^2.0.0). - Root composer.json requires lcobucci/content-negotiation-middleware ^3.1 -> satisfiable by lcobucci/content-negotiation-middleware[3.1.0, 3.1.x-dev, 3.2.x-dev]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Process completed with exit code 2.