ang/cython: 0.23.5 -> 0.24

Changes: https://github.com/cython/cython/blob/8b592122f23e0ce458521e5a828431c95a0d84e8/CHANGES.rst

PR: 209655
Submitted by: Phil Eaton <philneaton95@gmail.com>
Approved by: Vitaly Magerya <vmagerya@gmail.com> (maintainer)