message: Add exit() method to Task and use in create-app and create-plugin
diff: @@ -37,6 +37,10 @@ export class Task {
  process.stdout.write(`\n ${title}\n`);
  }
  + static exit(code: number = 0) {
  + process.exit(code);
  + }
  +
  static async forItem(
  task: string,
  item: string,
  