Remove Kotlin 1.4 stdlib function.

src/main/kotlin/io/github/gradlenexus/publishplugin/internal/StagingRepositoryTransitioner.kt

@@ -59,7 +59,7 @@ class StagingRepositoryTransitioner(val nexusClient: NexusClient, val retrier: A
     private fun assertRepositoryInDesiredState(repository: StagingRepository, vararg desiredStates: StagingRepository.State) {
         if (repository.state !in desiredStates) {
             throw RepositoryTransitionException(
-                "Staging repository is not in desired state ${desiredStates.contentToString()}: $repository. It is unexpected. Please check " +
+                "Staging repository is not in desired state ${desiredStates.contentDeepToString()}: $repository. It is unexpected. Please check " +
                     "the Nexus logs using its web interface - it can be caused by validation rules violation (e.g. publishing artifacts with the " +
                     "same version again). If not, please report it to https://github.com/gradle-nexus/publish-plugin/issues/ with the '--info' logs."
             )