Python Polars 0.15.7

🚀 Performance improvements

• impove performance reducing window functions with numeric output ~-14% (#5841)

✨ Enhancements

• allow more pyarrow literals (#5842)
• add sink_parquet (#5480)
• release GIL when writing (#5830)
• Support parsing more float string representations. (#5824)
• implement mean aggregation for duration (#5807)
• implement sensible boolean aggregates (#5806)

🐞 Bug fixes

• correct invalid type in struct anyvalue access (#5844)
• don't set fast_explode if null values in list (#5838)
• duration formatting (#5837)
• respect fetch in union (#5836)
• keep f32 dtype in fill_null by int (#5834)
• fix(python): fix delta issues (#5802)
• err on epoch on time dtype (#5831)
• fix panic in hmean (#5808)
• asof join by logical groups (#5805)

🛠️ Other improvements

• lazily import connectorx (#5835)

Thank you to all our contributors for making this release possible!
@chitralverma, @ghuls and @ritchie46