Add setting to change output name of ScalaJS bundle

[gehnaphore]

The filename is important because the generated source map refers to it by that name.

[lefou]

Is this still valid? Don't we support something like modules which affect the output names? /cc @lolgab

[lihaoyi]

This is now possible via def scalaJSOutputPatterns = OutputPatterns.fromJSFile("foo")

object foo extends ScalaJSModule {
  def scalaVersion = "2.13.8"
  def scalaJSVersion = "1.13.0"
  def ivyDeps = Agg(ivy"com.lihaoyi::scalatags::0.12.0")

  def scalaJSOutputPatterns = OutputPatterns.fromJSFile("foo")
}

[lefou]

• Fixed by Add support for scalaJSOutputPatterns #2233