Bump to v3.4.0.

lodash.sum/LICENSE.txt

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+Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
+Based on Underscore.js, copyright 2009-2015 Jeremy Ashkenas,
+DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

lodash.sum/README.md

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+# lodash.sum v3.4.0
+
+The [modern build](https://github.com/lodash/lodash/wiki/Build-Differences) of [lodash’s](https://lodash.com/) `_.sum` exported as a [Node.js](http://nodejs.org/)/[io.js](https://iojs.org/) module.
+
+## Installation
+
+Using npm:
+
+```bash
+$ {sudo -H} npm i -g npm
+$ npm i --save lodash.sum
+```
+
+In Node.js/io.js:
+
+```js
+var sum = require('lodash.sum');
+```
+
+See the [documentation](https://lodash.com/docs#sum) or [package source](https://github.com/lodash/lodash/blob/3.4.0-npm-packages/lodash.sum) for more details.

lodash.sum/index.js

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+/**
+ * lodash 3.4.0 (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 1.8.2 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <https://lodash.com/license>
+ */
+var toIterable = require('lodash._toiterable'),
+    isArray = require('lodash.isarray');
+
+/**
+ * Gets the sum of the values in `collection`.
+ *
+ * @static
+ * @memberOf _
+ * @category Math
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @returns {number} Returns the sum.
+ * @example
+ *
+ * _.sum([4, 6, 2]);
+ * // => 12
+ *
+ * _.sum({ 'a': 4, 'b': 6, 'c': 2 });
+ * // => 12
+ */
+function sum(collection) {
+  if (!isArray(collection)) {
+    collection = toIterable(collection);
+  }
+  var length = collection.length,
+      result = 0;
+
+  while (length--) {
+    result += +collection[length] || 0;
+  }
+  return result;
+}
+
+module.exports = sum;

lodash.sum/package.json

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+{
+  "name": "lodash.sum",
+  "version": "3.4.0",
+  "description": "The modern build of lodash’s `_.sum` as a module.",
+  "homepage": "https://lodash.com/",
+  "icon": "https://lodash.com/icon.svg",
+  "license": "MIT",
+  "keywords": "lodash, lodash-modularized, stdlib, util",
+  "author": "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+  "contributors": [
+    "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+    "Benjamin Tan <demoneaux@gmail.com> (https://d10.github.io/)",
+    "Blaine Bublitz <blaine@iceddev.com> (http://www.iceddev.com/)",
+    "Kit Cambridge <github@kitcambridge.be> (http://kitcambridge.be/)",
+    "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"
+  ],
+  "repository": "lodash/lodash",
+  "scripts": { "test": "echo \"See https://travis-ci.org/lodash/lodash-cli for testing details.\"" },
+  "dependencies": {
+    "lodash._toiterable": "^3.0.0",
+    "lodash.isarray": "^3.0.0"
+  }
+}