chore: bump narwhals to v1.14.2

[mattijn]

This PR updates pyproject.toml to update narwhals to v1.14.2.
Note: v1.14.2 is not yet on conda-forge (https://anaconda.org/conda-forge/narwhals/files)

[MarcoGorelli]

hey - just a quick note to clarify that I don't think the bump is strictly required - the code in Altair works perfectly fine as-is, this bump would only be necessary if you wanted to do

from narwhals.stable.v1.dependencies import is_pandas_dataframe
if is_pandas_dataframe(data):
    ...

instead of

import narwhals.stable.v1 as nw
if nw.dependencies.is_pandas_dataframe(data):
    ...

[dangotbanned]

hey - just a quick note to clarify that I don't think the bump is strictly required - the code in Altair works perfectly fine as-is, this bump would only be necessary if you wanted to do

from narwhals.stable.v1.dependencies import is_pandas_dataframe
if is_pandas_dataframe(data):
    ...

instead of

import narwhals.stable.v1 as nw
if nw.dependencies.is_pandas_dataframe(data):
    ...

@MarcoGorelli that's what I wanted to do in my PR but @mattijn beat me to it 😅

[mattijn]

Thanks @MarcoGorelli, good to know that current situation is fine as is. Will leave this PR open until @dangotbanned finds time to implements these new feature possibilities.

[dangotbanned]

Thanks @MarcoGorelli, good to know that current situation is fine as is. Will leave this PR open until @dangotbanned finds time to implements these new feature possibilities.

Doing this now @mattijn thank you