Narwhals v1.1.4

Changes

• Add additional sponsors and institutional partners to README (#573)
• bug: fix Series.__getitem__ typing (#569)

✨ Enhancements

• feat: Series.to_dummies, arrow sort and unique (#577)
• feat: add arrow value_counts (#576)
• feat: add Series.drop nulls for pyarrow (#542)
• feat: pyarrow series descriptive methods (#570)
• feat: add DataFrame__contains__, Expr.arg_true, and Series.arg_true (#568)

📖 Documentation

• docs: api completeness (#530)

Thank you to all our contributors for making this release possible!
@EdAbati, @FBruzzesi, @InessaPawson, @MarcoGorelli, @anopsy and @mfonekpo