Sqlalchemy-cratedb

- Dependencies: Use `crate==1.0.0dev0`

- Dependencies: Use `dask[dataframe]`
- Maintenance release after splitting packages `crate-python` vs.
`sqlalchemy-cratedb`

- Fix handling URL parameters `timeout` and `pool_size`
- Improve DDL compiler to ignore foreign key and uniqueness constraints.
- Ignore SQL's `FOR UPDATE` clause. Thanks, surister.

- Rename leftover occurrences of `Object`. The new symbol to represent
CrateDB's `OBJECT` column type is now `ObjectType`.

- DQL: Use CrateDB's native `ILIKE` operator instead of using SA's
generic implementation `lower() LIKE lower()`. Thanks, hlcianfagna.

- DDL: Allow turning off column store using `crate_columnstore=False`.
Thanks, fetzerms.

- DDL: Allow setting `server_default` on columns to enable
server-generated defaults. Thanks, JanLikar.

- Allow handling datetime values tagged with time zone info when inserting or updating.

- Fix SQL statement caching for CrateDB's `OBJECT` type. Thanks, faymarie.

- Refactor `OBJECT` type to use SQLAlchemy's JSON type infrastructure.

- Added `insert_bulk` fast-path `INSERT` method for pandas, in
order to support efficient batch inserts using CrateDB's "bulk operations" endpoint.

- Add documentation and software tests for usage with Dask

- Core: Re-enable support for `INSERT/UPDATE...RETURNING` in
SQLAlchemy 2.0 by adding the new `insert_returning` and `update_returning` flags
in the CrateDB dialect.