Log Message:
py-cython: updated to 0.29.34

0.29.34 (2023-04-02)

Bugs fixed
----------
* A refence leak of the for-loop list/tuple iterable was resolved if the for-loop's
  ``else:`` branch executes a ``break`` for an outer loop.
* Some C compile failures in CPython 3.12 were resolved.
* Some old usages of the deprecated Python ``imp`` module were replaced with \ 
``importlib``.
* Some issues with ``depfile`` generation were resolved.