chore: bump python requirement

configure.ac

@@ -816,7 +816,7 @@ if i:
     CFLAGS=$yac_save_CFLAGS
 dnl
    set 'setuptools' 'from setuptools import setup' 'build' \
-       'cython>=0.29.31' 'import cython; exit(tuple(map(int, cython.__version__.split("."))) < (0, 29, 31))' 'build' \
+       'cython>=3.0.0' 'import cython; exit(tuple(map(int, cython.__version__.split("."))) < (3, 0, 0))' 'build' \
        'numpy' 'import numpy' 'build' \
        'mpi4py' 'import mpi4py' 'run-extra' \
        'scipy' 'import scipy' 'run-extra' \