chore(release): 12.2.0-beta.4aac7d7

[skip ci]

CHANGELOG.md

@@ -82,6 +82,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `toInt` and `toFloat` should not throw on symbols by [@aleclarson](https://github.com/aleclarson) in [cafc7fc](https://github.com/radashi-org/radashi/commit/cafc7fc4833447d6e5ed6bdc88957201aae6372a)
 - **(toggle)** Handle falsy input as expected by [@Minhir](https://github.com/Minhir) in [#82](https://github.com/radashi-org/radashi/pull/82)
 
+- **(assign)** Fix overriding a nested object with null by [@aleclarson](https://github.com/aleclarson) in [#112](https://github.com/radashi-org/radashi/pull/112)
+
 
 #### <!-- 07 -->Performance
 - Avoid excessive array allocation in `fork` by [@localusercamp](https://github.com/localusercamp) in [#33](https://github.com/radashi-org/radashi/pull/33)