narwhals 1.27.0 on Python PyPI

Changes

perf: Avoid evaluating expr twice in mean_horizontal (#2028)
perf: avoid try/except in _hasattr_static (#2014)
perf: fast path for pandas-like group by with single expression and avoid resetting index if not necessary (#2010)

fix: adjust duckdb population skewness by correction factor to get sample skewness (#2021)
fix: sqlframe false positives in compliance checks (#2011)

chore(typing): Upgrade TypeGuard -> TypeIs (#2027)
refactor: remove Array shape default (#2026)
refactor: reuse Schema.to_<backend>() in from_numpy (#2024)
chore(typing): relax from_numpy to use Mapping, Sequence (#2023)
chore(typing): relax from_dict to use Mapping (#2022)
tests: Allow to run pytest narwhals --doctest-modules without ibis (#2019)
ci(typing): use tool.mypy.pretty = true (#2018)
fix: various typos (#2016)
ci: update pointblank deps to test downstream in ci (#2015)
chore(typing): resolve time unit/zone set invariance (#2012)
test: add test for sum_horizontal with column transformation (#2009)
chore: simplify when implementation (#2003)
ci: remove pyspark from Windows CI (#1998)
chore(typing): add overloads to isinstance_or_issubclass (#1997)
chore: parse series and ndarrays as expressions (#1994)
chore(typing): remove unused ignores (#1979)
fix: use mypy pre-commit in local environment (#1966)
chore: clean up flatten and extract (#1995)
chore: determine whether to use compliant_frame.aggregate at narwhals level (#1993)
chore: Refactor filter (#1992)
chore: alias named expressions at narwhals level (#1990)
chore: Expr metadata refactor (#1986)
chore: use toArrow in PySpark 4.0+ (#1987)
tests: skip cudf hist tests (#1988)

Thank you to all our contributors for making this release possible!
@DeaMariaLeon, @EdAbati, @FBruzzesi, @MarcoGorelli, @anopsy, @camriddell, @dangotbanned and @raisadz