While using composer...
Problem 1
- Installation request for php-http/curl-client ^2.0 -> satisfiable by php-http/curl-client[2.0.0].
- php-http/curl-client 2.0.0 requires php-http/httplug ^2.0 -> satisfiable by php-http/httplug[2.0.x-dev, v2.0.0] but these conflict with your requirements or minimum-stability.