Add explicit asgiref dependency

[RobbeSneyders]

We use asgiref as a direct dependency

connexion/connexion/decorators/main.py

Line 7 in ab94e2a

from asgiref.sync import async_to_sync

So should add it explicitly as well.

This issue is hidden in our tests since we install all extras. To prevent this, we need to address #1389.

[coveralls]

Pull Request Test Coverage Report for Build 4337711503

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.238%

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Totals
Change from base Build 4321937364:	0.0%
Covered Lines:	3268
Relevant Lines:	3505

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 4347858504

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.162%

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Totals
Change from base Build 4347813368:	0.0%
Covered Lines:	3270
Relevant Lines:	3510

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💛 - Coveralls

[Ruwann]

Is this the lowest version possible? Is it worth it to lower this if possible?

[RobbeSneyders]

I lowered it to match the lower bound that Flask defines.

[RobbeSneyders]

That didn't work. Bumped it back up to match the lower bound defined by uvicorn.