Update sbt-scalafix to 0.9.19

[scala-steward]

Updates ch.epfl.scala:sbt-scalafix from 0.9.18 to 0.9.19.
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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Ignore 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" } ]

labels: sbt-plugin-update, semver-patch

[codecov-commenter]

Codecov Report

Merging #3520 into master will decrease coverage by 0.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3520      +/-   ##
==========================================
- Coverage   91.49%   91.25%   -0.24%     
==========================================
  Files         386      385       -1     
  Lines        8486     8460      -26     
  Branches      231      258      +27     
==========================================
- Hits         7764     7720      -44     
- Misses        722      740      +18