Build: Bump cython from 3.0.2 to 3.0.3

[dependabot]

Bumps cython from 3.0.2 to 3.0.3.

Changelog

Sourced from cython's changelog.

3.0.3 (2023-10-05)

Features added

• More warnings were added to help users migrate and avoid bugs. (Github issue :issue:5650)

• A warning-like category for performance hints was added that bypasses -Werror. (Github issue :issue:5673)

• FastGIL now uses standard thread_local in C++. (Github issue :issue:5640)

• reference_wrapper was added to libcpp.functional. Patch by Vyas Ramasubramani. (Github issue :issue:5671)

• The cythonize command now supports the --cplus option known from the cython command. (Github issue :issue:5736)

Bugs fixed

• Performance regressions where the GIL was needlessly acquired were fixed. (Github issues :issue:5670, :issue:5700)

• A reference leak for exceptions in Python 3.12 was resolved. Patch by Eric Johnson. (Github issue :issue:5724)

• fastcall calls with keyword arguments generated incorrect C code. (Github issue :issue:5665)

• Assigning the type converted result of a conditional (if-else) expression to int or bool variables could lead to incorrect C code. (Github issue :issue:5731)

• Early (unlikely) failures in Python function wrappers no longer set a traceback in order to simplify the C code flow. Being mostly memory allocation errors, they probably would never have created a traceback anyway. (Github issue :issue:5681)

• Relative cimports from packages with __init__.py files could fail. (Github issue :issue:5715)

• Several issues with the Limited API support were resolved. (Github issues :issue:5641, :issue:5648, :issue:5689)

• The code generated for special-casing both Cython functions and PyCFunctions was cleaned up to avoid calling C-API functions that were not meant for the other type respectively.

... (truncated)

Commits

• 459f7c6 Officially support Python 3.12 (knowing that profiling is still broken there).
• 8dc5593 CI: Update workflow to use released Python 3.12.
• 263c719 Prepare the release of Cython 3.0.3.
• 73f872b Fix some typos found by codespell 2.2.5 (GH-5626)
• 9d18c52 Fix issue with mixed-type "x if y else z" expressions (#5735)
• ed2933b Clean up special handling of PyCFunction and CyFunction (GH-5739)
• 18d3e8e Suppress a spelling false positive found by codespell.
• f963e2e Fix some spelling mistakes found by codespell.
• 1f5d6a7 Allow --cplus argument in cythonize command (GH-5736)
• 61b5706 C++: Add "reference_wrapper" declarations to "libcpp.functional" (GH-5671)
• Additional commits viewable in compare view

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