[0.9.11][Gradle 6.0] - The DefaultSourceDirectorySet constructor has been deprecated. This is scheduled to be removed in Gradle 6.0. Please use the ObjectFactory service to create instances of SourceDirectorySet instead.

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## Warning:
```
$ gradlew test --warning-mode all

> Configure project :kotlin
The DefaultSourceDirectorySet constructor has been deprecated. This is scheduled to be removed in Gradle 6.0. Please use the ObjectFactory service to create instances of SourceDirectorySet instead.

> Configure project :python
The IvyArtifactRepository.layout(String, Action) method has been deprecated. This is scheduled to be removed in Gradle 6.0. Please use the IvyArtifactRepository.patternLayout(Action) method instead.
at build_axth602easyegl5bumoq1wlxr$_run_closure1.doCall(/Users/<>/repo/cs-interview-questions/python/build.gradle:6)
(Run with --stacktrace to get the full stack trace of this deprecation warning.)

BUILD SUCCESSFUL in 0s
8 actionable tasks: 2 executed, 6 up-to-date
```

Run `gradlew test --warning-mode all` and inspect the warning output, starting with `python/build.gradle` line 6 and the configuration for the `kotlin` project. Update the deprecated Gradle API usage identified there, then rerun the command and confirm the reported deprecation warnings are gone.

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