Testing with pamqp 3.0.0a4

[gmr]

I plan on releasing pamqp 3.0 soon and wanted to make sure you were aware of the changes that are making it into 3.0 and give you an opportunity to report any issues prior to its release.

Please see the version history @ https://pamqp.readthedocs.io/en/latest/history.html

[JustinTArthur]

Note the page linked above has been moved to https://pamqp.readthedocs.io/en/latest/changelog.html