update

[hyungjc99]

• [ ] Target the master branch for bug fixes, documentation updates and trivial changes.
• [ ] Target the features branch for new features and removals/deprecations.
• [ ] Include documentation when adding new features.
• [ ] Include new tests or update existing tests when applicable.

Unless your change is trivial or a small documentation fix (e.g., a typo or reword of a small section) please:

• [ ] Create a new changelog file in the changelog folder, with a name like <ISSUE NUMBER>.<TYPE>.rst. See changelog/README.rst for details.
• [ ] Add yourself to AUTHORS in alphabetical order;