Update sbt-scalafix to 0.10.4

[scala-steward]

Updates ch.epfl.scala:sbt-scalafix from 0.9.34 to 0.10.4. GitHub Release Notes - Version Diff

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

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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 = "@monthly" }, dependency = { groupId = "ch.epfl.scala", artifactId = "sbt-scalafix" } }] ```

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

[scala-steward]

Superseded by #149.