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diff --git a/backend/node_modules/lodash.isnumber/LICENSE b/backend/node_modules/lodash.isnumber/LICENSE
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+Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+Based on Underscore.js, copyright 2009-2016 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.
diff --git a/backend/node_modules/lodash.isnumber/README.md b/backend/node_modules/lodash.isnumber/README.md
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+# lodash.isnumber v3.0.3
+
+The [lodash](https://lodash.com/) method `_.isNumber` exported as a [Node.js](https://nodejs.org/) module.
+
+## Installation
+
+Using npm:
+```bash
+$ {sudo -H} npm i -g npm
+$ npm i --save lodash.isnumber
+```
+
+In Node.js:
+```js
+var isNumber = require('lodash.isnumber');
+```
+
+See the [documentation](https://lodash.com/docs#isNumber) or [package source](https://github.com/lodash/lodash/blob/3.0.3-npm-packages/lodash.isnumber) for more details.
diff --git a/backend/node_modules/lodash.isnumber/index.js b/backend/node_modules/lodash.isnumber/index.js
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+++ b/backend/node_modules/lodash.isnumber/index.js
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+/**
+ * lodash 3.0.3 (Custom Build) <https://lodash.com/>
+ * Build: `lodash modularize exports="npm" -o ./`
+ * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <https://lodash.com/license>
+ */
+
+/** `Object#toString` result references. */
+var numberTag = '[object Number]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `Number` primitive or object.
+ *
+ * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
+ * as numbers, use the `_.isFinite` method.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isNumber(3);
+ * // => true
+ *
+ * _.isNumber(Number.MIN_VALUE);
+ * // => true
+ *
+ * _.isNumber(Infinity);
+ * // => true
+ *
+ * _.isNumber('3');
+ * // => false
+ */
+function isNumber(value) {
+  return typeof value == 'number' ||
+    (isObjectLike(value) && objectToString.call(value) == numberTag);
+}
+
+module.exports = isNumber;
diff --git a/backend/node_modules/lodash.isnumber/package.json b/backend/node_modules/lodash.isnumber/package.json
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+++ b/backend/node_modules/lodash.isnumber/package.json
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+{
+  "name": "lodash.isnumber",
+  "version": "3.0.3",
+  "description": "The lodash method `_.isNumber` exported as a module.",
+  "homepage": "https://lodash.com/",
+  "icon": "https://lodash.com/icon.svg",
+  "license": "MIT",
+  "keywords": "lodash-modularized, isnumber",
+  "author": "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+  "contributors": [
+    "John-David Dalton <john.david.dalton@gmail.com> (http://allyoucanleet.com/)",
+    "Blaine Bublitz <blaine@iceddev.com> (https://github.com/phated)",
+    "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.\"" }
+}