test: re-enable psycopg2 build win ci with python 3.13 beta 1 New beta1 version now in GH actions ci. See if psycopg2 installs with it. [skip travis]

#!/usr/bin/env python
from __future__ import print_function
import zlib, base64, sys
print(base64.encodestring(zlib.compress(sys.stdin.read())))