Your requirements could not be resolved to an installable set of packages.
Problem 1
- mcfedr/awspushbundle 6.5.1 requires symfony/symfony ^2.8|^3.0 -> satisfiable by symfony/symfony[2.8.x-dev, 3.0.x-dev, 3.1.x-dev, 3.2.x-dev, v2.8.0, v2.8.0-BETA1, v2.8.1, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v3.0.0, v3.0.0-BETA1, v3.0.1, v3.0.2, v3.0.3, v3.0.4, v3.0.5, v3.0.6, v3.0.7, v3.0.8, v3.1.0, v3.1.0-BETA1, v3.1.0-RC1, v3.1.1, v3.1.2] but these conflict with your requirements or minimum-stability.
- mcfedr/awspushbundle 6.5.0 requires symfony/symfony ^2.8|^3.0 -> satisfiable by symfony/symfony[2.8.x-dev, 3.0.x-dev, 3.1.x-dev, 3.2.x-dev, v2.8.0, v2.8.0-BETA1, v2.8.1, v2.8.2, v2.8.3, v2.8.4, v2.8.5, v2.8.6, v2.8.7, v2.8.8, v3.0.0, v3.0.0-BETA1, v3.0.1, v3.0.2, v3.0.3, v3.0.4, v3.0.5, v3.0.6, v3.0.7, v3.0.8, v3.1.0, v3.1.0-BETA1, v3.1.0-RC1, v3.1.1, v3.1.2] but these conflict with your requirements or minimum-stability.
- Installation request for mcfedr/awspushbundle ^6.5 -> satisfiable by mcfedr/awspushbundle[6.5.0, 6.5.1].