Yarn 2 throws `Unsupported option name ("--mutex")`

[ptrdom]

--mutex is not a valid argument in Yarn 2, current implementation does not allow users to exclude it, will be resolved with #420.

scalajs-bundler/sbt-scalajs-bundler/src/main/scala/scalajsbundler/ExternalCommand.scala

Line 36 in d083e6d

private val yarnOptions = List("--non-interactive", "--mutex", "network")