It seems the build has recently started to fail on develop (and release/18.8) recently with the following error:

e: …/libs/editor/WordPressEditor/src/main/java/org/wordpress/android/editor/gutenberg/GutenbergDialogFragment.kt: (41, 9): Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.6.0, expected version is 1.4.2.

This PR attempts to fix this by updating kotlin to the latest stable 1.5.32.

This superseeds #15642, at least for now, since @ParaskP7 raised concerns that updating to kotlin 1.6.0 and jumping 2 versions at once could be a bit too dangerous, as there are apparently some issues with the latest Kotlin release. We could always consider still bumping to 1.6.0 in a later PR.

As part of this update, 'maxBy' was replaced by 'maxByOrNull', but other than that everything else remained the same.

h/t @ParaskP7 for doing all the legwork.

To test

Smoke test the app.

It's unlikely that these changes will have any impact on the application as the changes should be limited to compilation. Unfortunately there is no good way to verify that, so I think all we can do is smoke test the app and address anything that might come up in the future.

Regression Notes

1. Potential unintended areas of impact

• Compile errors that might not be covered by our regular CI integration (such as release builds)
• Possibly some issues in the app, but hopefully unlikely and there is no specific area to focus

2. What I did to test those areas of impact (or what existing automated tests I relied on)

• Mainly focused on getting successful builds in CI & local environment.

3. What automated tests I added (or what prevented me from doing so)

N/A

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.