Bump org.jetbrains.kotlin.plugin.serialization from 1.8.21 to 2.0.21

Bumps [org.jetbrains.kotlin.plugin.serialization](https://github.com/JetBrains/kotlin) from 1.8.21 to 2.0.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.0.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.8.21...v2.0.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ intelliJPlatform = "2.1.0"
 kotlin = "1.9.25"
 kover = "0.8.3"
 qodana = "2024.2.3"
-serialization = "1.8.21"
+serialization = "2.0.21"
 
 [libraries]
 junit = { group = "junit", name = "junit", version.ref = "junit" }