message: fix(fluid-build): Support flub generate typetests tasks in fluid-build
  This enables fluid-build to parse `flub generate typetests` as a
  typetest task. This should enable fluid-build to correctly cache type
  test task results as we switch to the new CLI.
diff: @@ -56,6 +56,7 @@ const executableToLeafTask: {
  "gen-version": GenVerTask,
  "api-extractor": ApiExtractorTask,
  "fluid-type-validator": TypeValidationTask,
  + "flub generate typetests": TypeValidationTask,
  };
  export class TaskFactory {
  