upgrade_0_12

Problem 1
    - netgen/layouts-ezplatform 0.12.0 requires netgen/content-browser-ezplatform ~0.12.0 -> satisfiable by netgen/content-browser-ezplatform[0.12.0].
    - Installation request for netgen/layouts-ezplatform ~0.12.0 -> satisfiable by netgen/layouts-ezplatform[0.12.0].
    - Conclusion: remove symfony/symfony v2.8.51
    - Conclusion: don't install symfony/symfony v2.8.51
    - Conclusion: don't install symfony/symfony v2.8.50
    - Conclusion: don't install symfony/symfony v2.8.49
    - Conclusion: don't install symfony/symfony v2.8.48
    - Conclusion: don't install symfony/symfony v2.8.47
    - Conclusion: don't install symfony/symfony v2.8.46
    - Conclusion: don't install symfony/symfony v2.8.45
    - Conclusion: don't install symfony/symfony v2.8.44
    - Conclusion: don't install symfony/symfony v2.8.43
    - Conclusion: don't install symfony/symfony v2.8.42
    - Conclusion: don't install symfony/symfony v2.8.41
    - Conclusion: don't install symfony/symfony v2.8.40
    - Conclusion: don't install symfony/symfony v2.8.39
    - Conclusion: don't install symfony/symfony v2.8.38
    - Conclusion: don't install symfony/symfony v2.8.37
    - Conclusion: don't install symfony/symfony v2.8.36
    - Conclusion: don't install symfony/symfony v2.8.35
    - Conclusion: don't install symfony/symfony v2.8.34
    - Conclusion: don't install symfony/symfony v2.8.33
    - Installation request for netgen/information-collection-bundle ^1.1 -> satisfiable by netgen/information-collection-bundle[v1.1.0, v1.2.0, v1.3.0, v1.3.1, v1.3.2, v1.3.3, v1.4.0, v1.4.1, v1.5.0, v1.5.1, v1.5.2, v1.5.3, v1.5.4, v1.6.0, v1.6.1, v1.6.2, v1.6.3, v1.6.4, v1.6.5, v1.6.6, v1.6.7].
    - Conclusion: don't install symfony/symfony v2.8.32
    - netgen/content-browser-ezplatform 0.12.0 requires ezsystems/ezpublish-kernel ^6.13 || ^7.0 -> satisfiable by ezsystems/ezpublish-kernel[v6.13.5.1, v6.13.0, v6.13.0.1, v6.13.1, v6.13.1.1, v6.13.1.2, v6.13.2, v6.13.3, v6.13.4, v6.13.5].
    - ezsystems/ezpublish-kernel v6.13.5.1 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.5.1 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.5 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.4 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.3 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.2 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.1.2 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.1.1 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.1 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.0.1 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - ezsystems/ezpublish-kernel v6.13.0 requires symfony/symfony ~2.7.38 | ~2.8.31 | ^3.3.13 -> satisfiable by symfony/symfony[v2.8.51, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.50].
    - Conclusion: don't install symfony/symfony v2.8.31