message: add file name back into tsconfig load error
diff: @@ -78,7 +78,7 @@ export class TSConfigReader extends OptionsComponent {
  load(event: DiscoverEvent, fileName: string) {
  const { config } = ts.readConfigFile(fileName, ts.sys.readFile);
  if (config === undefined) {
  - event.addError('No valid tsconfig file found.', fileName);
  + event.addError('No valid tsconfig file found for %s.', fileName);
  return;
  }
  if (!_.isPlainObject(config)) {
  