Bump org.jetbrains.kotlin.jvm from 1.9.25 to 2.1.20

Bumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 1.9.25 to 2.1.20.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.25...v2.1.20)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-version: 2.1.20
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ pmd = "7.7.0"
 # plugins
 changelog = "2.2.1"
 intelliJPlatform = "2.3.0"
-kotlin = "1.9.25"
+kotlin = "2.1.20"
 
 [libraries]
 junit = { group = "junit", name = "junit", version.ref = "junit" }