Update scala-library to 2.12.15

[scala-steward]

Updates org.scala-lang:scala-library from 2.12.14 to 2.12.15.

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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Have a fantastic day writing Scala!

Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "org.scala-lang", artifactId = "scala-library" } ]

labels: library-update, semver-patch

[codecov-commenter]

Codecov Report

Merging #266 (3c5af67) into main (9bffe8f) will decrease coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #266      +/-   ##
==========================================
- Coverage   96.22%   96.12%   -0.11%     
==========================================
  Files           8        8              
  Lines         980      980              
  Branches       93       93              
==========================================
- Hits          943      942       -1     
- Misses         37       38       +1     

Impacted Files	Coverage Δ
core/shared/src/main/scala/cats/parse/Parser.scala	95.98% <0.00%> (-0.13%)	⬇️

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[regadas]

Just needed a rebase.