Index: node_modules/deep-extend/lib/deep-extend.js
===================================================================
--- node_modules/deep-extend/lib/deep-extend.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/deep-extend/lib/deep-extend.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,150 @@
+/*!
+ * @description Recursive object extending
+ * @author Viacheslav Lotsmanov <lotsmanov89@gmail.com>
+ * @license MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2018 Viacheslav Lotsmanov
+ *
+ * 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.
+ */
+
+'use strict';
+
+function isSpecificValue(val) {
+	return (
+		val instanceof Buffer
+		|| val instanceof Date
+		|| val instanceof RegExp
+	) ? true : false;
+}
+
+function cloneSpecificValue(val) {
+	if (val instanceof Buffer) {
+		var x = Buffer.alloc
+			? Buffer.alloc(val.length)
+			: new Buffer(val.length);
+		val.copy(x);
+		return x;
+	} else if (val instanceof Date) {
+		return new Date(val.getTime());
+	} else if (val instanceof RegExp) {
+		return new RegExp(val);
+	} else {
+		throw new Error('Unexpected situation');
+	}
+}
+
+/**
+ * Recursive cloning array.
+ */
+function deepCloneArray(arr) {
+	var clone = [];
+	arr.forEach(function (item, index) {
+		if (typeof item === 'object' && item !== null) {
+			if (Array.isArray(item)) {
+				clone[index] = deepCloneArray(item);
+			} else if (isSpecificValue(item)) {
+				clone[index] = cloneSpecificValue(item);
+			} else {
+				clone[index] = deepExtend({}, item);
+			}
+		} else {
+			clone[index] = item;
+		}
+	});
+	return clone;
+}
+
+function safeGetProperty(object, property) {
+	return property === '__proto__' ? undefined : object[property];
+}
+
+/**
+ * Extening object that entered in first argument.
+ *
+ * Returns extended object or false if have no target object or incorrect type.
+ *
+ * If you wish to clone source object (without modify it), just use empty new
+ * object as first argument, like this:
+ *   deepExtend({}, yourObj_1, [yourObj_N]);
+ */
+var deepExtend = module.exports = function (/*obj_1, [obj_2], [obj_N]*/) {
+	if (arguments.length < 1 || typeof arguments[0] !== 'object') {
+		return false;
+	}
+
+	if (arguments.length < 2) {
+		return arguments[0];
+	}
+
+	var target = arguments[0];
+
+	// convert arguments to array and cut off target object
+	var args = Array.prototype.slice.call(arguments, 1);
+
+	var val, src, clone;
+
+	args.forEach(function (obj) {
+		// skip argument if isn't an object, is null, or is an array
+		if (typeof obj !== 'object' || obj === null || Array.isArray(obj)) {
+			return;
+		}
+
+		Object.keys(obj).forEach(function (key) {
+			src = safeGetProperty(target, key); // source value
+			val = safeGetProperty(obj, key); // new value
+
+			// recursion prevention
+			if (val === target) {
+				return;
+
+			/**
+			 * if new value isn't object then just overwrite by new value
+			 * instead of extending.
+			 */
+			} else if (typeof val !== 'object' || val === null) {
+				target[key] = val;
+				return;
+
+			// just clone arrays (and recursive clone objects inside)
+			} else if (Array.isArray(val)) {
+				target[key] = deepCloneArray(val);
+				return;
+
+			// custom cloning and overwrite for specific objects
+			} else if (isSpecificValue(val)) {
+				target[key] = cloneSpecificValue(val);
+				return;
+
+			// overwrite by new value if source isn't object or array
+			} else if (typeof src !== 'object' || src === null || Array.isArray(src)) {
+				target[key] = deepExtend({}, val);
+				return;
+
+			// source value and new value is objects both, extending...
+			} else {
+				target[key] = deepExtend(src, val);
+				return;
+			}
+		});
+	});
+
+	return target;
+};