Python Polars 0.20.22-rc.1

🚀 Performance improvements

• improve filter parallelism (#15686)

🐞 Bug fixes

• Add the missing feature flag for ewm_mean_by (#15687)
• 8/16-bits int could also apply in place for log expr (#15680)
• prepare_expression_for_context shouldn't panic if exceptions raised from optimizer (#15681)

📖 Documentation

• Various deprecation docstring improvements (#15648)

🛠️ Other improvements

• Make json_path_match expr non-anonymous (#15682)

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