update asynci python 3.11

[dpineiden]

Reason for the change
Adaptation to python asyncio for 3.11

Description
Cosmetic changes on sintaxis

Code examples
Now tow:
@asyncio.coroutine
Now:
async def fn

Checklist

• asyncio modern api
• connection without db and loop

References

Asyncio python docs

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[stephanelsmith]

Effectively the same as my PR. Mine has more of my project specific changes.

I think it's important this library get the simple 3.11 updates for asyncio.
#284

[lsabi]

As mentioned in the issue #285 (comment)

there's been already some effort trying to move from python 2 to the latest 3.XX version. New PRs shall be made against this branch

[srh]

Closing because this was fixed in a separate PR with @stephanelsmith 's commit from #284.