Applies Scala.
Applies Scala.js-specific optimizations to a sequence of .js files. See ScalaJSOptimizer.Inputs for details about the required and optional inputs. See ScalaJSOptimizer.OutputConfig for details about the configuration for the output of this method. Returns a ScalaJSOptimizer.Result containing the result of the optimizations. Its output file will contain, in that order:
Scala.js optimizer: does type-aware global dce.