How do I get Kotlin to work properly for my 1.3.50 projects? I do not plan to upgrade some of my projects in the near future. Or should I just ignore this message?

Why not upgrade, though? Most of the updates are super smooth

I have a bunch of small projects lying around which I just do a 3-5 line code changes to every 3-6 months. So not worth to go through them all, and it's all customer paid working hours, so can't just spend time on them as I want 😛

My point is, struggling with the IDE to deal with the version issue probably took you longer than a version update of Kotlin in the build file

Alternatively, add a bot to create PRs for you with updates? You'll still have to manage the PRs and check everything still works but you won't have to manually check all the projects for updates & create PRs

Configure Renovate with

automerge

for these projects + simple PR check to determine if upgrade didn't break the project. Just Add

renovate.json

(here is my sample) and setup

Renovate

plugin for repos in renovate dashboard Very simple and convenient way od keeping dependencies up to date