Update munit, munit-scalacheck to 0.7.21

[scala-steward]

Updates

• org.scalameta:munit
• org.scalameta:munit-scalacheck

from 0.7.20 to 0.7.21.
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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labels: test-library-update, semver-patch

[codecov-io]

Codecov Report

Merging #160 (d837f3c) into main (fa1b02c) will increase coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #160      +/-   ##
==========================================
+ Coverage   95.52%   95.63%   +0.10%     
==========================================
  Files           7        7              
  Lines         939      939              
  Branches       79       79              
==========================================
+ Hits          897      898       +1     
+ Misses         42       41       -1     

Impacted Files	Coverage Δ
core/shared/src/main/scala/cats/parse/Parser.scala	95.22% <0.00%> (+0.12%)	⬆️

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