release v1.2.1 (msgpack#698)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

release v1.2.0 (msgpack#692)

Wheels CI hangs for MacOS Intel (msgpack#689)

- Fix wheels generation for MacOS Intel, which is hanging due to gha VM
brownout:
https://github.com/msgpack/msgpack-python/actions/runs/26874183762/job/79271522595
- Run tests on MacOS Intel and on Ubuntu ARM

release v1.1.2 (msgpack#649)

release v1.1.0 (msgpack#622)

Release v1.1.0rc2 (msgpack#619)

do not install cython as build dependency (msgpack#610)

User can not cythonize during `pip install msgpack`.
So remove cython from build dependency.

If user need to use another Cython, user should download sdist, unzip,
manually cythonize, and `pip install .`.

Release v1.0.8 (msgpack#583)