Shillelagh

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- Add support for CSV files over HTTP(S) (296)
- Fix for fraction parsing in GSheets (298)
- Fix for negative dollar format in GSheets (299)
- Other small fixes and typos.

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- CLI now supports multi-line statements (205)
- Add new adapter for CSV/JSON/Parquet files stored in S3 (254)
- Add support for ``DROP TABLE`` (258)
- Add new adapter for scraping data from HTML tables (259)
- Add registry for adapters (268)
- Adapters can implement ``LIMIT`` and ``OFSET`` (270)
- Add support for polymorphic fields (280)
- Add docs on architecture (273), dialects (278)
- Improve docs on custom fields (275)
- Configuration directory is now system dependent (283)
- Row updates should no longer raise errors in SQLAlchemy (284)

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- Better serialize/deserialize for virtual table arguments, supporting bytes and other types

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- Represent integers as strings in SQLite to prevent overflow
- Add S3 Select adapter

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- Fix for column names with double quotes

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- Remove support for Python 3.7
- Remove upper bounds from dependencies