message: refactor(map): set generic type instead of any
diff: @@ -79,7 +79,7 @@ class MapSubscriber<T, R> extends Subscriber<T> {
  // NOTE: This looks unoptimized, but it's actually purposefully NOT
  // using try/catch optimizations.
  protected _next(value: T) {
  - let result: any;
  + let result: R;
  try {
  result = this.project.call(this.thisArg, value, this.count++);
  } catch (err) {
  