Bump org.jetbrains.kotlin:kotlin-test from 1.9.24 to 2.0.21

Bumps [org.jetbrains.kotlin:kotlin-test](https://github.com/JetBrains/kotlin) from 1.9.24 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@v1.9.24...v2.0.21)

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

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

build.gradle.kts

@@ -17,7 +17,7 @@ val nimbusVersion = "9.41.2"
 val detektVersion = "1.23.0"
 val kotestVersion = "5.9.1"
 val kotestExtensionsVersion = "2.0.0"
-val kotlinVersion = "1.9.24"
+val kotlinVersion = "2.0.21"
 val mockkVersion = "1.13.13"
 val postgresVersion = "42.7.4"
 val hikariVersion = "5.1.0"