Bump to v4.8.0.

isNaN.js

@@ -3,9 +3,10 @@ define(['./isNumber'], function(isNumber) {
   /**
    * Checks if `value` is `NaN`.
    *
-   * **Note:** This method is not the same as
-   * [`isNaN`](https://es5.github.io/#x15.1.2.4) which returns `true` for
-   * `undefined` and other non-numeric values.
+   * **Note:** This method is based on
+   * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+   * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+   * `undefined` and other non-number values.
    *
    * @static
    * @memberOf _