License inconsistency between npmjs.com and GitHub repository

[yosshi0525]

Hi, thank you for providing this useful library!

I have noticed that the license information shown on npmjs.com is "ISC", while the LICENSE file in this GitHub repository states "MIT".
Could you please clarify which license is the correct one for this project?
I would like to ensure proper compliance when using this library.

Thank you in advance for your help!