Method debug

packages/@vuepress/shared-utils/src/logger.ts:32–38

(...args: any[])

  // level: 4
  debug (...args: any[]) {
    if (this.options.logLevel < 4) {
      return
    }

    this.status('magenta', 'debug', ...args)
  }

  // level: 2
  warn (...args: any[]) {