Bump to v4.1.0.

_getLength.js

@@ -0,0 +1,16 @@
+define(['./_baseProperty'], function(baseProperty) {
+
+  /**
+   * Gets the "length" property value of `object`.
+   *
+   * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
+   * that affects Safari on at least iOS 8.1-8.3 ARM64.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @returns {*} Returns the "length" value.
+   */
+  var getLength = baseProperty('length');
+
+  return getLength;
+});