Update sbt-scalafix to 0.12.0

[scala-steward]

About this PR

📦 Updates ch.epfl.scala:sbt-scalafix from 0.11.1 to 0.12.0

📜 GitHub Release Notes - Version Diff

Usage

✅ Please merge!

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

Configure Scala Steward for your repository with a .scala-steward.conf file.

Have a fantastic day writing Scala!

⚙ Adjust future updates

Add this to your `.scala-steward.conf` file to ignore future updates of this dependency: ``` updates.ignore = [ { groupId = "ch.epfl.scala", artifactId = "sbt-scalafix" } ] ``` Or, add this to slow down future updates of this dependency: ``` dependencyOverrides = [{ pullRequests = { frequency = "30 days" }, dependency = { groupId = "ch.epfl.scala", artifactId = "sbt-scalafix" } }] ```

^{labels: sbt-plugin-update, early-semver-major, semver-spec-minor, commit-count:1}

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.63%. Comparing base (c8aae90) to head (935639d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #568 +/- ## ======================================= Coverage 95.63% 95.63% ======================================= Files 29 29 Lines 1190 1190 Branches 66 66 ======================================= Hits 1138 1138 Misses 52 52 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[scala-steward]

Superseded by #574.