chore: prepare release 0.17.1

[dbanty]

This PR was created by Knope. Merging it will create a new release

Features

Export Unset types from generated types.py (#927)

Generate properties for some boolean enums

If a schema has both type = "boolean" and enum defined, a normal boolean property will now be created.
Previously, the generator would error.

Note that the generate code will not correctly limit the values to the enum values. To work around this, use the
OpenAPI 3.1 const instead of enum to generate Python Literal types.

Thanks for reporting #922 @macmoritz!

Fixes

Do not stop generation for invalid enum values

This generator only supports enum values that are strings or integers.
Previously, this was handled at the parsing level, which would cause the generator to fail if there were any unsupported values in the document.
Now, the generator will correctly keep going, skipping only endpoints which contained unsupported values.

Thanks for reporting #922 @macmoritz!

Fix lists within unions

Fixes #756 and #928. Arrays within unions (which, as of 0.17 includes nullable arrays) would generate invalid code.

Thanks @kgutwin and @diesieben07!

Simplify type checks for non-required unions

[kgutwin]

Would you consider including #929? Hopefully it's a pretty easy bug fix to review. Also, I suggest taking a look at #931 because that's also a bug I uncovered from 0.17.0.