Bump the lib-dependencies group with 2 updates (#119)

Bumps the lib-dependencies group with 2 updates: [org.jetbrains.kotlin:kotlin-stdlib](https://github.com/JetBrains/kotlin) and [org.jetbrains.kotlin.android](https://github.com/JetBrains/kotlin).


Updates `org.jetbrains.kotlin:kotlin-stdlib` from 2.2.20 to 2.2.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.2.20...v2.2.21)

Updates `org.jetbrains.kotlin.android` from 2.2.20 to 2.2.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.2.20...v2.2.21)

Updates `org.jetbrains.kotlin.android` from 2.2.20 to 2.2.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.2.20...v2.2.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-version: 2.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: lib-dependencies
- dependency-name: org.jetbrains.kotlin.android
  dependency-version: 2.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: lib-dependencies
- dependency-name: org.jetbrains.kotlin.android
  dependency-version: 2.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: lib-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -11,7 +11,7 @@ guava = "33.5.0-android"
 # noinspection GradleDependency
 ical4j = "3.2.19"   # final version; update to 4.x will require much work
 junit = "4.13.2"
-kotlin = "2.2.20"
+kotlin = "2.2.21"
 mockk = "1.14.6"
 roboelectric = "4.16"
 slf4j = "2.0.17"