Build(deps): Bump formulaic from 1.1.1 to 1.2.0

[dependabot]

Bumps formulaic from 1.1.1 to 1.2.0.

Release notes

Sourced from formulaic's releases.

v1.2.0

Breaking changes:

• Formulaic now targets Python 3.9+ (dropping support for 3.7 and 3.8). (#234)
• ModelSpec.required_variables (and all other .required_variables implementations) now only include the root variable name (e.g. a.fillna -> a), since this is expected to be used to validate that dataframes have the expected columns. The full variable usage is still exposed via .variables and related attributes. You can lookup the the root variable using the .root property of each Variable instance. (#254)

New features and enhancements:

• We now use narwhals for all non-pandas dataframe types supported by narwhals (including polars dataframes and pyarrow tables). This should substantially improve performance for these types since historically the relevant parts of these dataframes were converted lazily to pandas objects. (#189)

Bugfixes and cleanups:

• Fixed compatibility with Scipy 1.16+.
• Factor instances no longer include backticks around factors evaluated using Python so that string representations can be interpreted correctly when parsed anew. (#256)
• FactorValue types are now always unwrapped during categorical encoding due to issues with wrapped numpy arrays.
• The entire code-base was updated to use Python 3.9+ typing annotation idioms.
• The docsite is now versioned (allowing historical versions to be explored).
• Various documentation typo fixes.

Special thanks to @​MarcoGorelli for his help in implementing Narwhals support.

Commits

• 61d9bdd 1.2.0
• 86ee6e7 Fully unit test narwhals backend.
• e710f7a Fix type in splines documentation.
• d2596ef Avoid quoting in backticks factors with eval_method of type python. (#256)
• 9f472c8 fix typo (#246)
• 955d664 Only indicate root variables in required_variables. (#254)
• c32d897 Fix misleading docs around passing in available variable overrides. (#252)
• 72bc9f9 Pin sparse output format to csc for consistency across all scipy versions. ...
• 497b2f7 Always unwrap factor values before use due to unfortunate interactions with n...
• 8552610 Add narwhals materializer for dataframe agnosticism. (#189)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #28.