diff --git a/composer.lock b/composer.lock
index 45e6e94..8cef51b 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,11 +1,10 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "hash": "aef7e32d65602af9e197d287373696f3",
-    "content-hash": "82281b7ebf88accc8c084eb976b3d7f0",
+    "content-hash": "53c6a6eb850e57f75c8e9426817c746a",
     "packages": [
         {
             "name": "classpreloader/classpreloader",
@@ -59,7 +58,7 @@
                 "class",
                 "preload"
             ],
-            "time": "2015-06-28 21:39:13"
+            "time": "2015-06-28T21:39:13+00:00"
         },
         {
             "name": "danielstjules/stringy",
@@ -115,7 +114,7 @@
                 "utility",
                 "utils"
             ],
-            "time": "2015-07-23 00:54:12"
+            "time": "2015-07-23T00:54:12+00:00"
         },
         {
             "name": "dnoegel/php-xdg-base-dir",
@@ -148,7 +147,7 @@
                 "MIT"
             ],
             "description": "implementation of xdg base directory specification for php",
-            "time": "2014-10-24 07:27:01"
+            "time": "2014-10-24T07:27:01+00:00"
         },
         {
             "name": "doctrine/inflector",
@@ -215,7 +214,7 @@
                 "singularize",
                 "string"
             ],
-            "time": "2015-11-06 14:35:42"
+            "time": "2015-11-06T14:35:42+00:00"
         },
         {
             "name": "jakub-onderka/php-console-color",
@@ -258,7 +257,7 @@
                     "homepage": "http://www.acci.cz"
                 }
             ],
-            "time": "2014-04-08 15:00:19"
+            "time": "2014-04-08T15:00:19+00:00"
         },
         {
             "name": "jakub-onderka/php-console-highlighter",
@@ -302,10 +301,10 @@
                     "homepage": "http://www.acci.cz/"
                 }
             ],
-            "time": "2015-04-20 18:58:01"
+            "time": "2015-04-20T18:58:01+00:00"
         },
         {
-            "name": "jeremeamia/SuperClosure",
+            "name": "jeremeamia/superclosure",
             "version": "2.1.0",
             "source": {
                 "type": "git",
@@ -360,7 +359,7 @@
                 "serialize",
                 "tokenizer"
             ],
-            "time": "2015-03-11 20:06:43"
+            "time": "2015-03-11T20:06:43+00:00"
         },
         {
             "name": "laravel/framework",
@@ -489,7 +488,7 @@
                 "framework",
                 "laravel"
             ],
-            "time": "2015-11-03 16:32:33"
+            "time": "2015-11-03T16:32:33+00:00"
         },
         {
             "name": "league/flysystem",
@@ -573,7 +572,7 @@
                 "sftp",
                 "storage"
             ],
-            "time": "2015-09-30 22:26:59"
+            "time": "2015-09-30T22:26:59+00:00"
         },
         {
             "name": "monolog/monolog",
@@ -650,7 +649,7 @@
                 "logging",
                 "psr-3"
             ],
-            "time": "2015-10-14 12:51:02"
+            "time": "2015-10-14T12:51:02+00:00"
         },
         {
             "name": "mtdowling/cron-expression",
@@ -694,7 +693,7 @@
                 "cron",
                 "schedule"
             ],
-            "time": "2015-01-11 23:07:46"
+            "time": "2015-01-11T23:07:46+00:00"
         },
         {
             "name": "nesbot/carbon",
@@ -741,7 +740,7 @@
                 "datetime",
                 "time"
             ],
-            "time": "2015-11-04 20:07:17"
+            "time": "2015-11-04T20:07:17+00:00"
         },
         {
             "name": "nikic/php-parser",
@@ -786,7 +785,7 @@
                 "parser",
                 "php"
             ],
-            "time": "2015-09-19 14:15:08"
+            "time": "2015-09-19T14:15:08+00:00"
         },
         {
             "name": "paragonie/random_compat",
@@ -831,7 +830,7 @@
                 "pseudorandom",
                 "random"
             ],
-            "time": "2015-10-23 13:21:37"
+            "time": "2015-10-23T13:21:37+00:00"
         },
         {
             "name": "psr/log",
@@ -869,7 +868,7 @@
                 "psr",
                 "psr-3"
             ],
-            "time": "2012-12-21 11:40:51"
+            "time": "2012-12-21T11:40:51+00:00"
         },
         {
             "name": "psy/psysh",
@@ -941,7 +940,7 @@
                 "interactive",
                 "shell"
             ],
-            "time": "2015-07-16 15:26:57"
+            "time": "2015-07-16T15:26:57+00:00"
         },
         {
             "name": "swiftmailer/swiftmailer",
@@ -994,7 +993,7 @@
                 "mail",
                 "mailer"
             ],
-            "time": "2015-06-06 14:19:39"
+            "time": "2015-06-06T14:19:39+00:00"
         },
         {
             "name": "symfony/console",
@@ -1050,7 +1049,7 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-20 14:38:46"
+            "time": "2015-10-20T14:38:46+00:00"
         },
         {
             "name": "symfony/css-selector",
@@ -1100,7 +1099,7 @@
             ],
             "description": "Symfony CssSelector Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-11 09:39:48"
+            "time": "2015-10-11T09:39:48+00:00"
         },
         {
             "name": "symfony/debug",
@@ -1154,7 +1153,7 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-11 09:39:48"
+            "time": "2015-10-11T09:39:48+00:00"
         },
         {
             "name": "symfony/dom-crawler",
@@ -1206,7 +1205,7 @@
             ],
             "description": "Symfony DomCrawler Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-11 09:39:48"
+            "time": "2015-10-11T09:39:48+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
@@ -1263,7 +1262,7 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-11 09:39:48"
+            "time": "2015-10-11T09:39:48+00:00"
         },
         {
             "name": "symfony/finder",
@@ -1309,24 +1308,25 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-11 09:39:48"
+            "time": "2015-10-11T09:39:48+00:00"
         },
         {
             "name": "symfony/http-foundation",
-            "version": "v2.7.6",
+            "version": "v2.7.51",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/http-foundation.git",
-                "reference": "7598eea151ae3d4134df1f9957364b17809eea75"
+                "reference": "b67e5cbd2bf837fb3681f2c4965826d6c6758532"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/7598eea151ae3d4134df1f9957364b17809eea75",
-                "reference": "7598eea151ae3d4134df1f9957364b17809eea75",
+                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/b67e5cbd2bf837fb3681f2c4965826d6c6758532",
+                "reference": "b67e5cbd2bf837fb3681f2c4965826d6c6758532",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.9"
+                "php": ">=5.3.9",
+                "symfony/polyfill-mbstring": "~1.1"
             },
             "require-dev": {
                 "symfony/expression-language": "~2.4"
@@ -1343,6 +1343,9 @@
                 },
                 "classmap": [
                     "Resources/stubs"
+                ],
+                "exclude-from-classmap": [
+                    "/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1361,7 +1364,7 @@
             ],
             "description": "Symfony HttpFoundation Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-23 14:47:27"
+            "time": "2019-04-16T09:58:21+00:00"
         },
         {
             "name": "symfony/http-kernel",
@@ -1440,7 +1443,66 @@
             ],
             "description": "Symfony HttpKernel Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-27 19:07:21"
+            "time": "2015-10-27T19:07:21+00:00"
+        },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.13.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/7b4aab9743c30be783b73de055d24a39cf4b954f",
+                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-mbstring": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.13-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Mbstring\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Mbstring extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "mbstring",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2019-11-27T14:18:11+00:00"
         },
         {
             "name": "symfony/process",
@@ -1486,7 +1548,7 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-23 14:47:27"
+            "time": "2015-10-23T14:47:27+00:00"
         },
         {
             "name": "symfony/routing",
@@ -1556,7 +1618,7 @@
                 "uri",
                 "url"
             ],
-            "time": "2015-10-27 15:38:06"
+            "time": "2015-10-27T15:38:06+00:00"
         },
         {
             "name": "symfony/translation",
@@ -1616,7 +1678,7 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-27 15:38:06"
+            "time": "2015-10-27T15:38:06+00:00"
         },
         {
             "name": "symfony/var-dumper",
@@ -1672,7 +1734,7 @@
                 "debug",
                 "dump"
             ],
-            "time": "2015-10-25 17:17:38"
+            "time": "2015-10-25T17:17:38+00:00"
         },
         {
             "name": "vlucas/phpdotenv",
@@ -1718,7 +1780,7 @@
                 "env",
                 "environment"
             ],
-            "time": "2015-05-30 15:59:26"
+            "time": "2015-05-30T15:59:26+00:00"
         }
     ],
     "packages-dev": [
@@ -1774,7 +1836,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2015-06-14 21:17:01"
+            "time": "2015-06-14T21:17:01+00:00"
         },
         {
             "name": "phpdocumentor/reflection-docblock",
@@ -1823,7 +1885,7 @@
                     "email": "mike.vanriel@naenius.com"
                 }
             ],
-            "time": "2015-02-03 12:10:50"
+            "time": "2015-02-03T12:10:50+00:00"
         },
         {
             "name": "phpspec/prophecy",
@@ -1883,7 +1945,7 @@
                 "spy",
                 "stub"
             ],
-            "time": "2015-08-13 10:07:40"
+            "time": "2015-08-13T10:07:40+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -1945,7 +2007,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2015-10-06 15:47:00"
+            "time": "2015-10-06T15:47:00+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -1992,7 +2054,7 @@
                 "filesystem",
                 "iterator"
             ],
-            "time": "2015-06-21 13:08:43"
+            "time": "2015-06-21T13:08:43+00:00"
         },
         {
             "name": "phpunit/php-text-template",
@@ -2033,7 +2095,7 @@
             "keywords": [
                 "template"
             ],
-            "time": "2015-06-21 13:50:34"
+            "time": "2015-06-21T13:50:34+00:00"
         },
         {
             "name": "phpunit/php-timer",
@@ -2074,7 +2136,7 @@
             "keywords": [
                 "timer"
             ],
-            "time": "2015-06-21 08:01:12"
+            "time": "2015-06-21T08:01:12+00:00"
         },
         {
             "name": "phpunit/php-token-stream",
@@ -2123,7 +2185,7 @@
             "keywords": [
                 "tokenizer"
             ],
-            "time": "2015-09-15 10:49:45"
+            "time": "2015-09-15T10:49:45+00:00"
         },
         {
             "name": "phpunit/phpunit",
@@ -2195,7 +2257,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2015-10-23 06:48:33"
+            "time": "2015-10-23T06:48:33+00:00"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -2251,7 +2313,8 @@
                 "mock",
                 "xunit"
             ],
-            "time": "2015-10-02 06:51:40"
+            "abandoned": true,
+            "time": "2015-10-02T06:51:40+00:00"
         },
         {
             "name": "sebastian/comparator",
@@ -2315,7 +2378,7 @@
                 "compare",
                 "equality"
             ],
-            "time": "2015-07-26 15:48:44"
+            "time": "2015-07-26T15:48:44+00:00"
         },
         {
             "name": "sebastian/diff",
@@ -2367,7 +2430,7 @@
             "keywords": [
                 "diff"
             ],
-            "time": "2015-02-22 15:13:53"
+            "time": "2015-02-22T15:13:53+00:00"
         },
         {
             "name": "sebastian/environment",
@@ -2417,7 +2480,7 @@
                 "environment",
                 "hhvm"
             ],
-            "time": "2015-08-03 06:14:51"
+            "time": "2015-08-03T06:14:51+00:00"
         },
         {
             "name": "sebastian/exporter",
@@ -2483,7 +2546,7 @@
                 "export",
                 "exporter"
             ],
-            "time": "2015-06-21 07:55:53"
+            "time": "2015-06-21T07:55:53+00:00"
         },
         {
             "name": "sebastian/global-state",
@@ -2534,7 +2597,7 @@
             "keywords": [
                 "global state"
             ],
-            "time": "2015-10-12 03:26:01"
+            "time": "2015-10-12T03:26:01+00:00"
         },
         {
             "name": "sebastian/recursion-context",
@@ -2587,7 +2650,7 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2015-06-21 08:04:50"
+            "time": "2015-06-21T08:04:50+00:00"
         },
         {
             "name": "sebastian/version",
@@ -2622,7 +2685,7 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21 13:59:46"
+            "time": "2015-06-21T13:59:46+00:00"
         },
         {
             "name": "symfony/yaml",
@@ -2668,7 +2731,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2015-10-11 09:39:48"
+            "time": "2015-10-11T09:39:48+00:00"
         }
     ],
     "aliases": [],
@@ -2677,7 +2740,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.4.0"
+        "php": ">=5.5.0"
     },
     "platform-dev": []
-}
\ No newline at end of file
+}