Narhwals v1.20.0

Changes

🚀 Performance improvements

• chore, perf: arrow cat namespace (#1663)

✨ Enhancements

• feat: raise informative error message when grouping by expressions (#1677)
• feat: expressify lower_bound and upper_bound in is_between (#1672)
• feat: Relax cuDF minimum version to 24.10.0 (#1649)
• Feat/add collect schema to interchange dfs (#1646)
• feat: Add support for .shift(n).over('col') for pandas-like DataFrames (#1627)

🐞 Bug fixes

• fix: pyspark group by with kwargs (#1665)

📖 Documentation

• docs: use IntoDataFrameT/IntoFrameT in docs (#1664)
• docs: Add return type description for more series namespace (#1675)
• docs: Add more return type descriptions for Series (#1674)
• docs: add return type descriptions for cum_count, cum_max, cum_min, cum_prod, cum_sum in Series (#1673)
• docs: add return type descriptions to Series arg_true, cast, clip, count (#1667)
• docs: Add return descriptions to Series's abs, alias, all, any methods for clarity (#1653)

🛠️ Other improvements

• chore: pyarrow do not combine chunks (#1662)
• chore: flatten subset in unique one level up (#1671)
• test: add test for nw.Expr|Series.str.contains with literal=True (#1670)
• test: check keys are in the same order in assert_equal_data (#1668)
• ci: improve publish ci to use env vars (#1652)
• chore: use __narwhals_namespace__ more (#1658)
• ci: split dev from extra (#1655)

Thank you to all our contributors for making this release possible!
@AlessandroMiola, @ClaudioSalvatoreArcidiacono, @Dhanunjaya-Elluri, @FBruzzesi, @MarcoGorelli and @luke396