Rust Polars 0.49.1

🚀 Performance improvements

• Optimize Bitmap::make_mut (#23138)

✨ Enhancements

• Allow expression input for length parameter in pad_start, pad_end, and zfill (#23182)

🐞 Bug fixes

• Expose FieldsMapper (#23232)
• Fix time zone handling in dt.iso_year and dt.is_leap_year (#23125)

📖 Documentation

• Update when_then in user guide (#23245)

🛠️ Other improvements

• Connect Python assert_dataframe_equal() to Rust back-end (#23207)
• Fix time zone handling in dt.iso_year and dt.is_leap_year (#23125)
• Update Rust Polars versions (#23229)

Thank you to all our contributors for making this release possible!
@Kevin-Patyk, @mcrumiller, @mrkn, @stijnherfst and @zyctree