Bump to v4.6.0.

difference.js

@@ -3,7 +3,8 @@ define(['./_baseDifference', './_baseFlatten', './isArrayLikeObject', './rest'],
   /**
    * Creates an array of unique `array` values not included in the other
    * given arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
-   * for equality comparisons.
+   * for equality comparisons. The order of result values is determined by the
+   * order they occur in the first array.
    *
    * @static
    * @memberOf _