    $ dart pub outdated

    Package Name  Current    Upgradable  Resolvable  Latest

    direct dependencies:
    args          1.4.4      1.6.0       1.6.0       1.6.0
    http          0.11.3+17  0.11.3+17   0.12.1      0.12.1
    path          1.6.2      1.6.2       1.6.2       1.7.0

    dev_dependencies: all up-to-date

    transitive dependencies:
    meta          1.1.6      1.1.6       1.1.6       1.1.8

    transitive dev_dependencies: all up-to-date

    1 upgradable dependency is locked (in pubspec.lock) to an older version.
    To update it, use `dart pub upgrade`.

    1 dependency is constrained to a version that is older than a resolvable version.
    To update it, edit pubspec.yaml.