Update sbt to 1.3.13

[scala-steward]

Updates org.scala-sbt:sbt from 1.3.12 to 1.3.13.
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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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-sbt", artifactId = "sbt" } ]

labels: library-update, semver-patch

[codecov]

Codecov Report

Merging #301 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #301      +/-   ##
==========================================
- Coverage   83.88%   83.83%   -0.06%     
==========================================
  Files          29       29              
  Lines        1899     1899              
  Branches       21       21              
==========================================
- Hits         1593     1592       -1     
- Misses        306      307       +1     

Impacted Files	Coverage Δ
.../scala/higherkindness/skeuomorph/avro/schema.scala	55.93% <0.00%> (-0.85%)	⬇️

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