Narwhals v1.18.2

Changes

🚀 Performance improvements

• perf: use lru_cache for native_to_narwhals_dtype (#1564)

✨ Enhancements

• feat: add Decimal dtype (#1571)
• feat: Preserve null values in old Polars versions for ewm_mean (#1574)
• enh: add read_parquet / scan_parquet (#1577)
• feat: add nw.Int128, nw.UInt128 (#1570)
• feat: add **kwargs to read_csv and scan_csv (#1560)
• feat: scan_csv (#1555)

📖 Documentation

• docs:add docstring series getitem (#1559)
• docs: Restore image in docs (#1573)
• docs: add security page to docs, try removing some temporary CI pins (#1568)
• docs: add nw.Expr.list, nw.Series.list to api-reference (#1558)

🛠️ Other improvements

• ci: fixup release process (#1580)
• refactor: use nw.scan_parquet in tpch benchmarks (#1578)
• ci: remove pull_request_target, sanitise github.ref_name (#1567)

Thank you to all our contributors for making this release possible!
@AlessandroMiola, @DeaMariaLeon, @MarcoGorelli, @TimOsahenru, @anopsy and @raisadz