global.json file
Author: Microsoft
Description: A file for selecting the .NET SDK version.

Usage:
  dotnet new globaljson [options] [template options]
  dotnet new global.json [options] [template options]

Options:
  -n, --name <name>      The name for the output being created. If no name is specified, the name of the output directory is used.
  -o, --output <output>  Location to place the generated output.
  --dry-run              Displays a summary of what would happen if the given command line were run if it would result in a template creation.
  --force                Forces content to be generated even if it would change existing files.
  --no-update-check      Disables checking for the template package updates when instantiating a template.
  --project <project>    The project that should be used for context evaluation.
  --type <item>          Specifies the template type to instantiate.

Template options:
  --sdk-version <sdk-version>                                                                           The version of the .NET SDK to use.
                                                                                                        Type: string
  --roll-forward <disable|feature|latestFeature|latestMajor|latestMinor|latestPatch|major|minor|patch>  The roll-forward policy to use when selecting an SDK version.
                                                                                                        Type: choice
                                                                                                          patch          Uses the specified version. If not found, rolls forward to the latest patch level. If not found, fails. This value is the legacy behavior from the earlier versions of the SDK.
                                                                                                          feature        Uses the latest patch level for the specified major, minor, and feature band. If not found, rolls forward to the next higher feature band within the same major/minor and uses the latest patch level for that feature band. If not found, fails.
                                                                                                          minor          Uses the latest patch level for the specified major, minor, and feature band. If not found, rolls forward to the next higher feature band within the same major/minor version and uses the latest patch level for that feature band. If not found, rolls forward to the next higher minor and feature band within the same major and uses the latest patch level for that feature band. If not found, fails.
                                                                                                          major          Uses the latest patch level for the specified major, minor, and feature band. If not found, rolls forward to the next higher feature band within the same major/minor version and uses the latest patch level for that feature band. If not found, rolls forward to the next higher minor and feature band within the same major and uses the latest patch level for that feature band. If not found, rolls forward to the next higher major, minor, and feature band and uses the latest patch level for that feature band. If not found, fails.
                                                                                                          latestPatch    Uses the latest installed patch level that matches the requested major, minor, and feature band with a patch level and that is greater or equal than the specified value. If not found, fails.
                                                                                                          latestFeature  Uses the highest installed feature band and patch level that matches the requested major and minor with a feature band and patch level that is greater or equal than the specified value. If not found, fails.
                                                                                                          latestMinor    Uses the highest installed minor, feature band, and patch level that matches the requested major with a minor, feature band, and patch level that is greater or equal than the specified value. If not found, fails.
                                                                                                          latestMajor    Uses the highest installed .NET SDK with a version that is greater or equal than the specified value. If not found, fail.
                                                                                                          disable        Doesn't roll forward. Exact match required.