Piccolo-api

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* Added Python 3.11 support.
* ``PiccoloCRUD`` validators can now be async.
* Improved logging.
* The minimum version of FastAPI is now ``0.87.0``. The reason for this is
Starlette made a fairly large change in version ``0.21.0``, which meant we
had to refactor a lot of our tests, which makes it challenging to support
older versions.

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Improving type annotations:

* Adding ``id: Serial`` for ``SessionsBase`` and ``TokenAuth``.
* Fixed type annotations for latest version of Starlette (thanks to sinisaos
for this).

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If ``BaseUser`` is used with ``PiccoloCRUD``, passwords are handled properly.
Thanks to sinisaos for making this change.

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``PiccoloCRUD`` now handles database exceptions better. If a query fails due to
a unique constraint, a 422 response code is returned, along with information
about the error.

This means Piccolo Admin will show more useful debugging information when a
query fails.

Thanks to ethagnawl for reporting this issue, and sinisaos for help
prototyping a solution.

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Fixed a bug with ``Email`` columns and ``PiccoloCRUD.get_new``. Thanks to
Tar8117 for reporting this bug.

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Previously you had to provide ``folder_name`` as an argument to
``S3MediaStorage``.

It's now optional, as some users may choose to store their files in a bucket
without a folder.

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