Add note to _.createCallback docs.

Former-commit-id: 0e5dfa9b4dc9aeea1c821b47d2f3d755678ea1aa

dist/lodash.compat.js

@@ -4235,6 +4235,9 @@
      * If `func` is an object, the created callback will return `true` for elements
      * that contain the equivalent object properties, otherwise it will return `false`.
      *
+     * Note: All Lo-Dash methods, that accept a `callback` argument, internally
+     * use `_.createCallback`.
+     *
      * @static
      * @memberOf _
      * @category Functions

dist/lodash.js

@@ -4047,6 +4047,9 @@
      * If `func` is an object, the created callback will return `true` for elements
      * that contain the equivalent object properties, otherwise it will return `false`.
      *
+     * Note: All Lo-Dash methods, that accept a `callback` argument, internally
+     * use `_.createCallback`.
+     *
      * @static
      * @memberOf _
      * @category Functions

dist/lodash.underscore.js

@@ -3399,6 +3399,9 @@
    * If `func` is an object, the created callback will return `true` for elements
    * that contain the equivalent object properties, otherwise it will return `false`.
    *
+   * Note: All Lo-Dash methods, that accept a `callback` argument, internally
+   * use `_.createCallback`.
+   *
    * @static
    * @memberOf _
    * @category Functions