PyPy compatibility issue #49
Description
New release is not compatible with PyPy, release 0.5.1 works fine.
==================================== ERRORS ====================================
__________________ ERROR collecting tests/unit/test_client.py __________________
tests/unit/test_client.py:28: in <module>
from requests_kerberos.exceptions import KerberosExchangeError
/opt/hostedtoolcache/PyPy/3.9.19/x64/lib/pypy3.9/site-packages/requests_kerberos/__init__.py:[17](https://github.com/trinodb/trino-python-client/actions/runs/10265585114/job/28402087736#step:5:18): in <module>
from .kerberos_ import HTTPKerberosAuth, REQUIRED, OPTIONAL, DISABLED
/opt/hostedtoolcache/PyPy/3.9.19/x64/lib/pypy3.9/site-packages/requests_kerberos/kerberos_.py:6: in <module>
import spnego
/opt/hostedtoolcache/PyPy/3.9.[19](https://github.com/trinodb/trino-python-client/actions/runs/10265585114/job/28402087736#step:5:20)/x64/lib/pypy3.9/site-packages/spnego/__init__.py:26: in <module>
from spnego.auth import client, server
/opt/hostedtoolcache/PyPy/3.9.19/x64/lib/pypy3.9/site-packages/spnego/auth.py:9: in <module>
from spnego._gss import GSSAPIProxy
/opt/hostedtoolcache/PyPy/3.9.19/x64/lib/pypy3.9/site-packages/spnego/_gss.py:48: in <module>
import krb5
/opt/hostedtoolcache/PyPy/3.9.19/x64/lib/pypy3.9/site-packages/krb5/__init__.py:4: in <module>
from krb5._ccache import (
src/krb5/_ccache.pyx:1: in init krb5._ccache
???
src/krb5/_creds.pyx:1: in init krb5._creds
???
src/krb5/_kt.pyx:1: in init krb5._kt
???
src/krb5/_principal.pyx:1: in init krb5._principal
???
E ValueError: array.array size changed, may indicate binary incompatibility. Expected 72 from C header, got [24](https://github.com/trinodb/trino-python-client/actions/runs/10265585114/job/28402087736#step:5:25) from PyObject