DBD::DuckDB TODO

• [ ] Convert to XS ??
• [ ] Create more tests
• [X] ~~Implement simple Sqllogictest (https://www.sqlite.org/sqllogictest/doc/trunk/about.wiki)~~
• [X] ~~Expose all DuckDB functions in FFI~~
• [X] ~~Add duckdb_config support~~
• [ ] Add support for NULLABLE, SCALE and PRECISION attributes
• [ ] Implement DUCKDB_TYPE_BIGNUM
• [X] ~~Implement DUCKDB_TYPE_BIT~~
• [X] ~~Implement DUCKDB_TYPE_ENUM~~
• [ ] Use Time::Piece for format DATE and TIMESTAMP
• [ ] UTF-8 support
• [ ] UDF support