Released CuPy v13.0.0a1 & v12.1.0

[Kenichi Maehashi]

We have released CuPy v13.0.0a1 and v12.1.0.

Please refer to the release notes at:

https://github.com/cupy/cupy/releases/tag/v13.0.0a1

https://github.com/cupy/cupy/releases/tag/v12.1.0

CuPy v13 Roadmap and Revised Release Schedule

• We have published a list of feature roadmaps for CuPy v13 planned to be released in October 2023. See #7555 for the details.
• Starting in the CuPy v13 development cycle, we have adjusted our release frequency to once every two months. Mid-term or hot-fix releases may be provided depending on necessity, such as for new CUDA/Python version support or critical bug fixes. This new policy also applies to v12 releases.
• RFC: We plan to drop CUDA 10.2/11.0/11.1 support in CuPy v13. Please leave a comment on #7557 if you have any suggestions.
• RFC: We are thinking of improving PyTorch interoperability features in CuPy. If you are interested, please join the discussion in #7556.