build(deps): Update polars requirement from <=0.19.15 to <=0.20.0

[dependabot[bot]]

Updates the requirements on polars to permit the latest version.

Release notes

Sourced from polars's releases.

Python Polars 0.20.0

This version includes quite a few breaking changes. We are preparing for the 1.0 release and aim to make the upgrade from 0.20 to 1.0 as smooth as possible. Therefore, we prioritized getting any breaking changes in now rather than with 1.0.

Check out the upgrade guide for help navigating the upgrade to this version.

Please bear with us while we continue to make Polars the best tool it can be!

🏆 Highlights

• Add new Enum categorical data type which allows a fixed set of categories (#11822)

💥 Breaking changes

• Use Object Store instead of fsspec for read_parquet (#13044)
• Reimplement replace expression on the Rust side (#13002)
• Preserve left and right join keys in outer joins (#12963)
• Update update signature (#12986)
• Update Expr.count to ignore null values by default (#12934)
• Scheduled removal of previously deprecated functionality (#12885)
• Allow all DataType objects to be instantiated (#12470)
• Change value_counts resulting column name from counts to count (#12506)
• Change default join behavior with regard to nulls, add join_nulls parameter to keep existing behavior (#12840)
• Default to exact checking for integers in assertion utils (#12331)
• Set default dtype for Series to Null when no data is present (#12807)
• Update lit behavior for list/tuple inputs (#12559)
• Change DataType.is_nested from property to classmethod (#12453)
• Update constructors for Array and Decimal (#12837)
• Smaller integer data types for datetime components (#12070)
• Fix NaN ordering to make NaNs compare greater than any other float, and equal to themselves (#12721)

⚠️ Deprecations

• Rename write_database parameter if_exists to if_table_exists (#12783)

🚀 Performance improvements

• Avoid dispatching to expression engine for various Series methods (#13010)
• Elide allocation in outer join materialization (#12992)
• Avoid dispatching Series.head/tail to the expression engine (#12946)
• Ensure we reduce for any/all_horizontal (#12976)
• Add fast paths for UTC in truncate (#12965)
• Use select_seq for expression dispatch (#12962)
• Improve rolling_median algorithm (#12704)
• Use fast path for non-null data in new SQL-like null matching (#12874)
• Optimize DataFrame.iter_rows for smaller buffer sizes (#12804)
• Speed up initializing Series from a list of NumPy arrays (#12785)

✨ Enhancements

• Add str.contains_any and str.replace_many (Aho-Corasick algorithms) (#13073)

... (truncated)

Commits

• f96d2cd python polars 0.20.0 (#13074)
• 1f4c54c docs(python): Update version switcher for 0.20 (#12844)
• a511870 docs(python): Add upgrade guide for Python Polars 0.20 (#12872)
• ecc5c4c feat: str namespace; add aho-corasick expressions: 'contains_any' and 'replac...
• 65bf678 feat: auto infer .aws creds (#13062)
• 3f1ef64 feat: support private s3 (#13060)
• 9bff6d8 fix: fix off by 1 error in nearest quantile (#13058)
• fc03c4a feat(python)!: Use Object Store instead of fsspec for read_parquet (#13044)
• 345e741 bug(rust): fix for incorrect schema inference on nested columns (#13057)
• 1e841a5 fix: dont raise for datetime_range if starting on ambiguous datetime and earl...
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[dependabot[bot]]

Superseded by #253.