It appears that the repository has undergone several changes and renamings:

backend/node_modules/lodash.castarray/index.js

@@ -1,75 +0,0 @@
-/**
- * lodash 4.4.0 (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>
- */
-
-/**
- * Casts `value` as an array if it's not one.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the cast array.
- * @example
- *
- * _.castArray(1);
- * // => [1]
- *
- * _.castArray({ 'a': 1 });
- * // => [{ 'a': 1 }]
- *
- * _.castArray('abc');
- * // => ['abc']
- *
- * _.castArray(null);
- * // => [null]
- *
- * _.castArray(undefined);
- * // => [undefined]
- *
- * _.castArray();
- * // => []
- *
- * var array = [1, 2, 3];
- * console.log(_.castArray(array) === array);
- * // => true
- */
-function castArray() {
-  if (!arguments.length) {
-    return [];
-  }
-  var value = arguments[0];
-  return isArray(value) ? value : [value];
-}
-
-/**
- * Checks if `value` is classified as an `Array` object.
- *
- * @static
- * @memberOf _
- * @type {Function}
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isArray([1, 2, 3]);
- * // => true
- *
- * _.isArray(document.body.children);
- * // => false
- *
- * _.isArray('abc');
- * // => false
- *
- * _.isArray(_.noop);
- * // => false
- */
-var isArray = Array.isArray;
-
-module.exports = castArray;