Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires datana-gmbh/fake-api-client ^1.0, found datana-gmbh/fake-api-client[dev-master] but it does not match the constraint.

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires datana-gmbh/fake-api-client ^1.0, found datana-gmbh/fake-api-client[dev-master] but it does not match the constraint.