Bump to v3.9.2.

object/set.js

@@ -32,13 +32,13 @@ define(['../internal/isIndex', '../internal/isKey', '../lang/isObject', '../inte
 
     var index = -1,
         length = path.length,
-        endIndex = length - 1,
+        lastIndex = length - 1,
         nested = object;
 
     while (nested != null && ++index < length) {
       var key = path[index];
       if (isObject(nested)) {
-        if (index == endIndex) {
+        if (index == lastIndex) {
           nested[key] = value;
         } else if (nested[key] == null) {
           nested[key] = isIndex(path[index + 1]) ? [] : {};