build(deps): bump polars from 0.20.15 to 0.20.20

[dependabot]

Bumps polars from 0.20.15 to 0.20.20.

Release notes

Sourced from polars's releases.

Python Polars 0.20.20

🚀 Performance improvements

• Fix cross join batch size when one of the DataFrames is tiny (#14347)
• Fix binview growable complexity O(n*m) -> O(n) (#15628)
• Remove extra thread spawn from row group fetcher (#15626)
• Use vertical parallelism if input is chunked for Filter,Select,WithColumns (#15608)
• Refactor CSV serialization to not go thorough AnyValue (#15576)
• don't use dynamic dispatch in visitors (#15607)
• Improve Bitmap construction performance (#15570)
• join by row-encoding (#15559)

✨ Enhancements

• add Expr.dt.add_business_days and Series.dt.add_business_days (#15595)
• Add str.head and str.tail (#14425)
• Add union/or operator for pl.Enum (#14965)
• Extended BytecodeParser to handle additional math functions, and imports from the global namespace (#15627)
• Push down is_between expressions to Arrow (#15180)
• add holidays argument to business_day_count (#15580)
• change default to write parquet statistics (#15597)
• Expressify to_integer (#15604)
• Optimizer; remove double SORT and redundant projections (#15573)
• Add null_on_oob parameter to expr.array.get (#15426)
• support weekend argument in business_day_count (#15544)
• Enable is_first/last_distinct for not nested non-numeric list (#15552)
• Turn off cse if cache node found (#15554)
• Tag concat list as elementwise (#15545)

🐞 Bug fixes

• Return appropriate data type for time mean and median (#14471)
• Fix issue in write_excel that could lead to incorrect spanning range determination (#15631)
• Output correct dtype for mean_horizontal on a single column (#15118)
• Recompute RowIndex schema after projection pd (#15625)
• Mean of boolean in streaming group_by incorrectly always gave NULL (#15616)
• Include cloud creds in cache key (#15609)
• Fix elementwise-apply if any input is AggregatedScalar (#15606)
• Explode list should take validity into account (#15572)
• use larger recursive stack in debug mode (#15593)
• SQL interface "off-by-one' indexing error with GROUP BY clauses that use position ordinals (#15584)
• Enable missing features in polars-time (#15558)
• Handle quoted identifiers when registering CTEs in the SQL engine (#15564)
• Decompress moved out of schema initialization (#15550)
• Turn off cse if cache node found (#15554)

📖 Documentation

• Add legacy CPU install instructions in user guide (#13676)
• Examples for errors (#13724)

... (truncated)

Commits

• 8547d86 python polars 0.20.20 (#15635)
• 4eef5b5 feat: add Expr.dt.add_business_days and Series.dt.add_business_days (#15595)
• 1d8870a docs: Add legacy CPU install instructions in user guide (#13676)
• 5ab78ce perf: Fix cross join batch size when one of the DataFrames is tiny (#14347)
• 4b1b945 fix: Return appropriate data type for time mean and median (#14471)
• ce39151 fix(rust): Support index upsampling (#13621)
• 920f96f docs(python): Examples for errors (#13724)
• 33c04d5 docs(python): Add docstring examples for reading json (#14481)
• 429d3dd feat: Add str.head and str.tail (#14425)
• e5a3620 fix: Fix issue in write_excel that could lead to incorrect spanning range d...
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[dependabot]

Superseded by #17.