Bump to v4.0.1.

map.js

@@ -29,11 +29,11 @@ import isArray from './isArray';
  *   return n * n;
  * }
  *
- * _.map([1, 2], square);
- * // => [3, 6]
+ * _.map([4, 8], square);
+ * // => [16, 64]
  *
- * _.map({ 'a': 1, 'b': 2 }, square);
- * // => [3, 6] (iteration order is not guaranteed)
+ * _.map({ 'a': 4, 'b': 8 }, square);
+ * // => [16, 64] (iteration order is not guaranteed)
  *
  * var users = [
  *   { 'user': 'barney' },