Hi, want to confirm that what's the latest version of pants for a scala project? Is it 1.30? Pants 2 hasn't supported scala yet? Thank you!

That's correct. 1.30.2 technically: https://pypi.org/project/pantsbuild.pants/1.30.2/

Thank you! And I want to upgrade pants version of a project from 1.5.0 to 1.30.2, do you know any instructions for this?

(Shared over DM already, but for posterity) https://www.pantsbuild.org/docs/upgrade-tips