message: Converted code to be node 4 friendlier because ... :(
diff: @@ -231,8 +231,14 @@ export class Bundler {
  }
  }
  - // Remove bundles which have no files (due to excludes).
  - bundles.splice(0, bundles.length, ...bundles.filter(b => b.files.size > 0));
  + let b = 0;
  + while (b < bundles.length) {
  + if (bundles[b].files.size < 0) {
  + bundles.splice(b, 1);
  + } else {
  + ++b;
  + }
  + }
  }
  /**
  