Update sbt-typelevel to 0.4.21

[scala-steward]

About this PR

📦 Updates org.typelevel:sbt-typelevel from 0.4.20 to 0.4.21

📜 GitHub Release Notes - Version Diff

Usage

✅ Please merge!

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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⚙ Adjust future updates

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

updates.ignore = [ { groupId = "org.typelevel", artifactId = "sbt-typelevel" } ] 

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

dependencyOverrides = [{ pullRequests = { frequency = "30 days" }, dependency = { groupId = "org.typelevel", artifactId = "sbt-typelevel" } }] 

^{labels: sbt-plugin-update, early-semver-minor, semver-spec-patch, version-scheme:early-semver, commit-count:n:2}

[armanbilge]

Oh, I missed the failed CI job. I don't see how this error is related to these changes? 🤔

[error] ## Exception when compiling 1 sources to /home/runner/work/scala-js-macrotask-executor/scala-js-macrotask-executor/webworker/target/scala-3.1.3/test-classes [error] java.lang.AssertionError: assertion failed: Bad superClass for class Short: val <none> [error] scala.runtime.Scala3RunTime$.assertFailed(Scala3RunTime.scala:8) [error] dotty.tools.backend.jvm.BTypesFromSymbols.setClassInfo(BTypesFromSymbols.scala:114) [error] dotty.tools.backend.jvm.BTypesFromSymbols.classBTypeFromSymbol$$anonfun$1(BTypesFromSymbols.scala:90) [error] scala.collection.mutable.HashMap.getOrElse(HashMap.scala:436) [error] dotty.tools.backend.jvm.BTypesFromSymbols.classBTypeFromSymbol(BTypesFromSymbols.scala:91) [error] dotty.tools.backend.jvm.CoreBTypes.BOXED_SHORT(CoreBTypes.scala:[60](https://github.com/scala-js/scala-js-macrotask-executor/actions/runs/5077829664/jobs/9121582773?pr=86#step:9:61)) ... 

[sjrd]

Looks like it was spurious.