Using 'null' as ReadJsonOptions.inferSchemaLength produces Error

[leventea1]

Have you tried latest version of polars?

• [yes]

What version of polars are you using?

0.15.0

What operating system are you using polars on?

MacOS Sonoma Version 14.4 (23E214)

What node version are you using

node v20.17.0

Describe your bug.

Cannot use null as ReadJsonOptions.inferSchemaLength

What are the steps to reproduce the behavior?

import pl from 'nodejs-polars';
...
pl.readJSON(filePath, { format: "lines", inferSchemaLength: null });

What is the actual behavior?

Currently, setting inferSchemaLength to 'null' throws an error.

<path>/node_modules/nodejs-polars/bin/io.js:139
        return (0, dataframe_1._DataFrame)(method(pathOrBody, options));
                                           ^

Error: Failed to convert napi value Null into rust type `u32` on ReadJsonOptions.inferSchemaLength
    at Object.readJSON (<path>/node_modules/nodejs-polars/bin/io.js:139:44)

What is the expected behavior?

According to docs, it should be working with 'null'
https://github.com/pola-rs/nodejs-polars/blob/main/polars/io.ts#L287

If set to `null`, a full table scan will be done (slow).

[Bidek56]

Have you tried?

import pl from 'nodejs-polars';
pl.readJSON(filePath, { format: "lines" });

[leventea1]

This works of course:
pl.readJSON(filePath, { format: "lines", inferSchemaLength: 0 });
but still, the documentation is inconsistent with the behavior.

Have you tried?

import pl from 'nodejs-polars';
pl.readJSON(filePath, { format: "lines" });