Update sbt-scalajs, scalajs-compiler, ... to 1.21.0

[scala-steward]

About this PR

📦 Updates

• org.scala-js:sbt-scalajs
• org.scala-js:scalajs-compiler
• org.scala-js:scalajs-library
• org.scala-js:scalajs-library_2.13
• org.scala-js:scalajs-test-bridge
• org.scala-js:scalajs-test-bridge_2.13

from 1.20.2 to 1.21.0

📜 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.

Configure Scala Steward for your repository with a .scala-steward.conf file.

Have a fantastic day writing Scala!

⚙ Adjust future updates

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

updates.ignore = [ { groupId = "org.scala-js" } ]

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

dependencyOverrides = [{
  pullRequests = { frequency = "30 days" },
  dependency = { groupId = "org.scala-js" }
}]

^{labels: library-update, early-semver-minor, semver-spec-minor, commit-count:1}

[mergify]

Merge Queue Status

• ✅ Entered queue — 2026-04-05 15:30 UTC · Rule: default
• ✅ Checks passed · on draft merge queue: embarking master (0574c81) and #324 together #325
• ✅ Merged — 2026-04-05 15:33 UTC · at 67404647a385fe175bfd682f805844a1eb2659c2

This pull request spent 2 minutes 14 seconds in the queue, including 1 minute 59 seconds running CI.

Required conditions to merge

• check-success~=build \(2.13.\d+\)
• check-success~=build \(3.3.\d+\)