Update aiohttp dependency

[agentultra]

This change updates aiohttp to >= 0.22.1 and updates the code to the new APIs.

[kxepal]

@agentultra Hi Thanks for PR, but suddenly it requires a little bit more work to do. It's too long to explain, just hold on a bit. I hope to return to the project in a couple of days.

[agentultra]

@kxepal Understood... some of the APIs have changed quite a bit and I did my best on the first pass to keep things lined up.

I'm working on a script that uses aiocouchdb with the aiobotocore library and they use conflicting versions of aiohttp. I'm here to help any way I can as I really need to get this working.

[SakuraSound]

Any chance of this getting done?

[kxepal]

Oh, sorry! Yes, will handle this today.

[SakuraSound]

Thank you! I was originally going to fork and try to push something, but i saw that this was one Error shy of being merged.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
0 out of 2 committers have signed the CLA.

:x: agentultra
:x: weeverjames
_{You have signed the CLA already but the status is still pending? Let us recheck it.}