Update semanticdb-scalac to 4.3.15

[scala-steward]

Updates org.scalameta:semanticdb-scalac from 4.3.14 to 4.3.15.
GitHub Release Notes - Version Diff

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.

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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 = "org.scalameta", artifactId = "semanticdb-scalac" } ]

labels: library-update, semver-patch

[codecov-commenter]

Codecov Report

Merging #379 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #379   +/-   ##
=======================================
  Coverage   86.45%   86.45%           
=======================================
  Files         137      137           
  Lines        1491     1491           
  Branches       31       31           
=======================================
  Hits         1289     1289           
  Misses        202      202           

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