code: function parseBoolean (name, enabled) {
    let isEnabled
    if (typeof enabled === 'undefined' || enabled === 'true') {
      isEnabled = true
    } else if (typeof enabled !== 'undefined' && enabled === 'false') {
      isEnabled = false
    } else {
      console.error(`Invalid argument for ${name}, please provide true or false`)
      process.exit(1)
    }
    return isEnabled
  }
docs: Used by commander to parse boolean and fails if invalid
  value is passed in
  @private