message: docs: write about constructor's parameters
diff: @@ -38,6 +38,14 @@ client.record
  ## KintoneRestAPIClient
  +| Name | Type | Required | Description |
  +| ------------------ | :--------------: | :-------------------------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  +| baseUrl | String | Conditionally<br />Required | The base URL for your Kintone environment.<br />It must start with `https`. (e.g. https://example.kintone.com) <br />Required in Node.js environment. If you omit it in browser environment, `location.origin` will be used. |
  +| auth | Object | Conditionally<br />Required | |
  +| guestSpaceId | Number or String | | The guest space ID. If you operate apps made inside a guest space, please specify this. |
  +| basicAuth | Object | | If your Kintone environment uses [Basic authentication](https://developer.kintone.io/hc/en-us/articles/212495188#basicauthentication), please specify its username and password. |
  +| basicAuth.username | String | | The username of Basic authentication. |
  +| basicAuth.password | String | | The password of Basic authentication. |
  ## KintoneRestAPIError
  ## References
  