Update more dependencies to various stable versions

[Kami]

This PR updates more dependencies to latest stable versions.

Only potentially more risky ones could be kombu / amqp, but I went over the changelog and integration + end to end tests should catch if there are any issues.

[Kami]

OK, tests exposed an issue with kombu / pyaqmp upgrade.

ssl.cert_reqs now defaults to ssl.CERT_REQUIRED is ?ssl=true is passed via URL which is a good and right thing, but our existing tests rely on that value defaulting to cert.none (which used to be true in older versions. Because od that, integration tests will fail since we use a custom cert for the server which is not part of the system ca bundle.

Problem also is that one of the tests is mixing connection parameters in URL + connection parameters via config option - and that doesn't work well / correctly when trying to use custom ca cert for ssl validation. If user wants to use custom ssl options, they need to do that via config option and not via url.

I think I can fix / change that test and document that behavior in docs and upgrade notes and we should be fine.

[blag]

Thanks for getting this done.