This PR upgrades to Kotlin 1.7.20.

Comment From: wilkinsona

Thanks, @izeye. We prefer to handle one-liner dependency upgrades like this using our automated tooling.

Comment From: snicoll

Thanks for the PR @izeye but we don't need a PR for straightforward dependency upgrades like that. We'll run our semi-automated process soon that'll pick up this one. See the PR template for more details.

Comment From: izeye

@wilkinsona @snicoll Sorry, I thought it's not covered by the tool.