Bump to v3.1.1.

lodash.keys/README.md

@@ -1,4 +1,4 @@
-# lodash.keys v3.1.0
+# lodash.keys v3.1.1
 
 The [modern build](https://github.com/lodash/lodash/wiki/Build-Differences) of [lodash’s](https://lodash.com/) `_.keys` exported as a [Node.js](http://nodejs.org/)/[io.js](https://iojs.org/) module.
 
@@ -17,4 +17,4 @@ In Node.js/io.js:
 var keys = require('lodash.keys');
 ```
 
-See the [documentation](https://lodash.com/docs#keys) or [package source](https://github.com/lodash/lodash/blob/3.1.0-npm-packages/lodash.keys) for more details.
+See the [documentation](https://lodash.com/docs#keys) or [package source](https://github.com/lodash/lodash/blob/3.1.1-npm-packages/lodash.keys) for more details.

lodash.keys/index.js

@@ -1,5 +1,5 @@
 /**
- * lodash 3.1.0 (Custom Build) <https://lodash.com/>
+ * lodash 3.1.1 (Custom Build) <https://lodash.com/>
  * Build: `lodash modern modularize exports="npm" -o ./`
  * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
@@ -10,6 +10,9 @@ var getNative = require('lodash._getnative'),
     isArguments = require('lodash.isarguments'),
     isArray = require('lodash.isarray');
 
+/** Used to detect unsigned integer values. */
+var reIsUint = /^\d+$/;
+
 /** Used for native method references. */
 var objectProto = Object.prototype;
 
@@ -70,7 +73,7 @@ function isArrayLike(value) {
  * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
  */
 function isIndex(value, length) {
-  value = typeof value == 'number' ? value : parseFloat(value);
+  value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
   length = length == null ? MAX_SAFE_INTEGER : length;
   return value > -1 && value % 1 == 0 && value < length;
 }

lodash.keys/package.json

@@ -1,6 +1,6 @@
 {
   "name": "lodash.keys",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "description": "The modern build of lodash’s `_.keys` as a module.",
   "homepage": "https://lodash.com/",
   "icon": "https://lodash.com/icon.svg",