asyngpg doesn't work due to c-bindings

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Hi,

I am currently compiling using the following command:

`shiv --site-packages .env\Lib\site-packages -c runx -o runx.pyz`

"runx" is a custom console app I have packaged.

asyncpg is one of the dependencies.

However when I run `C:\python310\python.exe runx.pyz`, I get the following error:

```
File "\site-packages\psccommon\db\db.py", line 4, in
import asyncpg
File "\site-packages\asyncpg\__init__.py", line 8, in
from .connection import connect, Connection # NOQA
File "\site-packages\asyncpg\connection.py", line 19, in
from . import connect_utils
File "\site-packages\asyncpg\connect_utils.py", line 27, in
from . import protocol
File "\site-packages\asyncpg\protocol\__init__.py", line 8, in
from .protocol import Protocol, Record, NO_TIMEOUT # NOQA
ModuleNotFoundError: No module named 'asyncpg.protocol.protocol'
```

Note that this is on a different machine to the build machine, however they are both Windows 10 builds.

What can I do to mitigate this?

Thanks

Reproduce the shiv command on Windows with an application that depends on asyncpg, using the traceback as the starting point. Compare the build and target environments and inspect whether asyncpg.protocol.protocol is included in the generated archive; done means the packaged application imports asyncpg successfully on the second Windows machine.

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