PyPI install test failure

[jeongyoonlee]

Describe the bug

PyPI install test is failing due to the issue reported in #534. The issue has been fixed in #640 but a new version hasn't been released to PyPI yet.

Currently, the test is triggered by push as we don't expect the change introduced in every push to be available in PyPI.

To Reproduce

Push a commit or tag.

Expected behavior

No build or test failure.

Screenshots

Environment (please complete the following information):

• OS: [e.g. macOS, Windows, Ubuntu]
• Python Version: [e.g. 3.6, 3.7]
• Versions of Major Dependencies (pandas, scikit-learn, cython): [e.g. pandas==0.25, scikit-learn==0.22, cython==0.28]

Additional context