Log Message:
py-amqp: updated to 5.1.1

5.1.1
=====
- Use AF_UNSPEC for name resolution

5.1.0
=====
- Improve performance of _get_free_channel_id, fix channel max bug
- Document memoryview usage, minor frame_writer.write_frame refactor
- Start dropping python 3.6
- Added experimental __slots__ to some classes
- Relaxed vine version for upcoming release.
- Upgraded topytest 7