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## 0.31.23

**`(chore):`** ## What's Changed

* (feature, typescript): Add setObjectProperty core utility by @amckinney in [https://github.com/fern-api/fern/pull/4032](https://github.com/fern-api/fern/pull/4032)
* c#, fix: increase supported union size + handle double optionals by @dcb6 in [https://github.com/fern-api/fern/pull/4033](https://github.com/fern-api/fern/pull/4033)
* (fix): Handle circular references in serialization layer by @amckinney in [https://github.com/fern-api/fern/pull/4036](https://github.com/fern-api/fern/pull/4036)
* fix: fastapi generation does not duplicate descriptions anymore by @armandobelardo in [https://github.com/fern-api/fern/pull/4037](https://github.com/fern-api/fern/pull/4037)
* Move use_str_enums to base by @jochs in [https://github.com/fern-api/fern/pull/4040](https://github.com/fern-api/fern/pull/4040)
* (chore): remove generator upgrade docs by @chdeskur in [https://github.com/fern-api/fern/pull/4043](https://github.com/fern-api/fern/pull/4043)
* (feature, openapi): Add support for x-fern-property-name on request body by @amckinney in [https://github.com/fern-api/fern/pull/4042](https://github.com/fern-api/fern/pull/4042)
* (feat, typescript): refactor `Fetcher` and add unit tests by @williamluer in [https://github.com/fern-api/fern/pull/3977](https://github.com/fern-api/fern/pull/3977)

## New Contributors

* @jochs made their first contribution in [https://github.com/fern-api/fern/pull/4040](https://github.com/fern-api/fern/pull/4040)

**Full Changelog**: [https://github.com/fern-api/fern/compare/0.31.22...0.31.23](https://github.com/fern-api/fern/compare/0.31.22...0.31.23)

## 0.31.23-rc0

**`(chore):`** ## What's Changed

* (feature, typescript): Add setObjectProperty core utility by @amckinney in [https://github.com/fern-api/fern/pull/4032](https://github.com/fern-api/fern/pull/4032)
* c#, fix: increase supported union size + handle double optionals by @dcb6 in [https://github.com/fern-api/fern/pull/4033](https://github.com/fern-api/fern/pull/4033)
* (fix): Handle circular references in serialization layer by @amckinney in [https://github.com/fern-api/fern/pull/4036](https://github.com/fern-api/fern/pull/4036)
* fix: fastapi generation does not duplicate descriptions anymore by @armandobelardo in [https://github.com/fern-api/fern/pull/4037](https://github.com/fern-api/fern/pull/4037)
* (feat): ir now adds a TypeReference for container types that makes it easier to generate snippets by @dcb6 in [https://github.com/fern-api/fern/pull/4038](https://github.com/fern-api/fern/pull/4038)

**Full Changelog**: [https://github.com/fern-api/fern/compare/0.31.22...0.31.23-rc0](https://github.com/fern-api/fern/compare/0.31.22...0.31.23-rc0)