Update scalajs-sbt-test-adapter_2.13 to 1.12.0

[scala-steward]

Updates org.scala-js:scalajs-sbt-test-adapter_2.13 from 1.11.0 to 1.12.0.
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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Files still referring to the old version number

The following files still refer to the old version number (1.11.0).
You might want to review and update them manually.

website/docs/guides/internals.md
website/docs/guides/scala-js.md
website/docs/reference/cli-options.md
website/docs/reference/scala-command/cli-options.md
website/docs/reference/scala-command/runner-specification.md
website/yarn.lock

Adjust future updates

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

updates.ignore = [ { groupId = "org.scala-js", artifactId = "scalajs-sbt-test-adapter_2.13" } ]

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

dependencyOverrides = [{
  pullRequests = { frequency = "@monthly" },
  dependency = { groupId = "org.scala-js", artifactId = "scalajs-sbt-test-adapter_2.13" }
}]

labels: library-update, early-semver-minor, semver-spec-minor, old-version-remains, commit-count:1