Update sbt-wartremover, wartremover to 2.4.21

[scala-steward]

Updates

• org.wartremover:sbt-wartremover
• org.wartremover:wartremover

from 2.4.20 to 2.4.21.

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 = "org.wartremover" } ]

Or, add this to slow down future updates of this dependency:

dependencyOverrides = [{
  pullRequests = { frequency = "@monthly" },
  dependency = { groupId = "org.wartremover" }
}]

labels: library-update, early-semver-patch, semver-spec-patch, commit-count:1

[codecov]

Codecov Report

Merging #156 (c96ec6f) into master (57e387d) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #156      +/-   ##
==========================================
- Coverage   96.76%   96.75%   -0.02%     
==========================================
  Files          16       15       -1     
  Lines         309      308       -1     
  Branches       15       15              
==========================================
- Hits          299      298       -1     
  Misses         10       10              

Impacted Files	Coverage Δ
...ithub/takayahilton/sqlformatter/core/package.scala

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