$ pub outdated --json
{
  "packages": []
}

$ pub outdated --no-color
Found no outdated packages.

$ pub outdated --no-color --mark=none
Found no outdated packages.

$ pub outdated --no-color --up-to-date
Found no outdated packages.

$ pub outdated --no-color --pre-releases
Found no outdated packages.

$ pub outdated --no-color --no-dev-dependencies
Found no outdated packages.

$ pub outdated --no-color --no-dependency-overrides
Found no outdated packages.