Position of `nullable` property changed in output document

[bkoelman]

Please restore the position of the nullable property in the output document. Comparing 2.0 preview with 1.x stable, it has moved:

While technically the position shouldn't matter, this difference makes it a pain to assess whether the preview version produces a similar output document in our test suite. We have about 12,000 tests, many of which compare fragments of the OAS file, failing on changes like this.

[baywet]

Hi @bkoelman
Thank you for using the SDK and for reaching out.

We chatted about this while reviewing the other issue. While we won't be fixing that before the general availability as we're trying to prioritize the work, we might look at that after.

Is this something you'd like to submit a pull request for provided some guidance?

[bkoelman]

PR here: #2358.