⬆️ deps: Update dependency Cython to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Cython (source)	^0.29.25 -> ^3.0.0

---

Release Notes

cython/cython (Cython)

v3.0.0

Compare Source

===========================

Cython 3.0.0 has been a very large effort that cleaned up many old warts,
introduced many new features, and introduces a couple of intentional
behaviour changes, even though the goal remained to stay compatible as
much as possible with Cython 0.29.x. For details, see the migration guide_.

.. _migration guide: https://cython.readthedocs.io/en/latest/src/userguide/migrating_to_cy30.html

As the development was spread out over several years, a lot of things have
happened in the meantime. Many crucial bugfixes and some features were
backported to 0.29.x and are not strictly speaking "new" in Cython 3.0.0.

v0.29.36

Compare Source

====================

Bugs fixed

• Async generators lost their return value in PyPy.
  (Github issue :issue:5465)

• The outdated C macro _PyGC_FINALIZED() is no longer used in Py3.9+.

• The deprecated Py_OptimizeFlag is no longer used in Python 3.9+.
  (Github issue :issue:5343)

• Using the global __debug__ variable but not assertions could lead to compile errors.

• The broken HTML template support was removed from Tempita.
  (Github issue :issue:3309)

.. _0.29.35:

---

Configuration

📅 Schedule: Branch creation - "before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.