[PATCH] setup.py: remove the 'U' open mode removed in Python 3.11 The 'U' open mode was removed in Python 3.11. See: https://docs.python.org/3.11/library/functions.html#open
Installing with Python 3.11 fails with:
/path/to/python-magic-wormhole-mailbox-server-0.4.1/setup.py", line 20, in <module> long_description=open('README.md', 'rU').read(), ^^^^^^^^^^^^^^^^^^^^^^^ ValueError: invalid mode: 'rU'
