diff --git a/composer.json b/composer.json
index bb6d820..4da6b47 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     },
     "require": {
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-        "symfony/symfony": "3.2.*",
+        "symfony/symfony": "3.4.*",
         "doctrine/orm": "^2.5",
         "doctrine/doctrine-bundle": "^1.6",
         "doctrine/doctrine-cache-bundle": "^1.2",
diff --git a/composer.lock b/composer.lock
index 00ccd07..2b98ba3 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",
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-    "hash": "8d826a49c1c271d2953d5d050bee090e",
-    "content-hash": "991100687a847396fa77799afb9d57a3",
+    "content-hash": "239800e129390d817016642032a30812",
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@@ -73,20 +72,20 @@
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-            "time": "2015-08-31 12:32:49"
+            "time": "2015-08-31T12:32:49+00:00"
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-            "version": "v1.6.1",
+            "version": "v1.6.2",
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@@ -143,7 +142,7 @@
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-            "time": "2016-10-29 11:16:17"
+            "time": "2017-07-22T12:49:21+00:00"
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@@ -209,7 +208,7 @@
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                 "iterator"
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-            "time": "2015-04-14 22:21:58"
+            "time": "2015-04-14T22:21:58+00:00"
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@@ -282,7 +281,7 @@
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                 "spl"
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-            "time": "2016-11-30 16:50:46"
+            "time": "2016-11-30T16:50:46+00:00"
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@@ -353,7 +352,7 @@
                 "persistence",
                 "queryobject"
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-            "time": "2016-12-04 05:53:43"
+            "time": "2016-12-04T05:53:43+00:00"
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@@ -434,7 +433,7 @@
                 "orm",
                 "persistence"
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-            "time": "2017-01-07 21:47:22"
+            "time": "2017-01-07T21:47:22+00:00"
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@@ -522,7 +521,7 @@
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-            "time": "2016-01-26 17:28:51"
+            "time": "2016-01-26T17:28:51+00:00"
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@@ -589,7 +588,7 @@
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-            "time": "2015-11-06 14:35:42"
+            "time": "2015-11-06T14:35:42+00:00"
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@@ -643,25 +642,28 @@
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-            "time": "2015-06-14 21:17:01"
+            "time": "2015-06-14T21:17:01+00:00"
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+            },
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@@ -669,8 +671,8 @@
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@@ -691,25 +693,28 @@
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-            "description": "Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.",
-            "homepage": "http://www.doctrine-project.org",
+            "description": "PHP Doctrine Lexer parser library that can be used in Top-Down, Recursive Descent Parsers.",
+            "homepage": "https://www.doctrine-project.org/projects/lexer.html",
             "keywords": [
+                "annotations",
+                "docblock",
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-                "parser"
+                "parser",
+                "php"
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-            "time": "2014-09-09 13:34:57"
+            "time": "2019-06-08T11:03:04+00:00"
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-                "url": "https://github.com/doctrine/doctrine2.git",
+                "url": "https://github.com/doctrine/orm.git",
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@@ -773,7 +778,61 @@
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-            "time": "2016-12-18 15:42:34"
+            "time": "2016-12-18T15:42:34+00:00"
+        },
+        {
+            "name": "fig/link-util",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/link-util.git",
+                "reference": "1a07821801a148be4add11ab0603e4af55a72fac"
+            },
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.0",
+                "psr/link": "~1.0@dev"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^5.1",
+                "squizlabs/php_codesniffer": "^2.3.1"
+            },
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
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+            ],
+            "description": "Common utility implementations for HTTP links",
+            "keywords": [
+                "http",
+                "http-link",
+                "link",
+                "psr",
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+                "rest"
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@@ -870,7 +929,7 @@
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@@ -921,7 +980,7 @@
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@@ -971,7 +1030,7 @@
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                 "sql"
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-            "time": "2014-01-12 16:20:24"
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@@ -1022,7 +1081,7 @@
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+            "time": "2016-12-05T10:18:33+00:00"
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@@ -1057,7 +1116,7 @@
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@@ -1132,7 +1191,7 @@
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@@ -1202,7 +1261,7 @@
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-            "time": "2015-11-10 12:26:42"
+            "time": "2015-11-10T12:26:42+00:00"
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@@ -1280,20 +1339,20 @@
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                 "psr-3"
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-            "time": "2016-11-26 00:15:39"
+            "time": "2016-11-26T00:15:39+00:00"
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-            "version": "v2.0.4",
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                 "url": "https://github.com/paragonie/random_compat.git",
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@@ -1325,10 +1384,11 @@
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             "keywords": [
                 "csprng",
+                "polyfill",
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                 "random"
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+            "time": "2019-01-03T20:59:08+00:00"
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@@ -1376,7 +1436,7 @@
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@@ -1426,7 +1486,7 @@
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-            "time": "2015-07-25 16:39:46"
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@@ -1472,20 +1532,118 @@
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+            "time": "2016-08-06T20:24:11+00:00"
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+            "version": "1.0.0",
+            "source": {
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+                "url": "https://github.com/php-fig/container.git",
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+            "notification-url": "https://packagist.org/downloads/",
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+            "authors": [
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+                    "homepage": "http://www.php-fig.org/"
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+            "description": "Common Container Interface (PHP FIG PSR-11)",
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+            "version": "1.0.0",
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+                "url": "https://github.com/php-fig/link.git",
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+            "license": [
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+                    "homepage": "http://www.php-fig.org/"
+                }
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+                "http-link",
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@@ -1494,7 +1652,7 @@
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@@ -1519,7 +1677,55 @@
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-            "time": "2016-10-10 12:19:37"
+            "time": "2019-11-01T11:05:21+00:00"
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+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/simple-cache.git",
+                "reference": "408d5eafb83c57f6365a3ca330ff23aa4a5fa39b"
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+                "reference": "408d5eafb83c57f6365a3ca330ff23aa4a5fa39b",
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+            "require": {
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+            "extra": {
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+                    "dev-master": "1.0.x-dev"
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+            "autoload": {
+                "psr-4": {
+                    "Psr\\SimpleCache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interfaces for simple caching",
+            "keywords": [
+                "cache",
+                "caching",
+                "psr",
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+                "simple-cache"
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@@ -1571,7 +1777,7 @@
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-            "time": "2017-01-10 14:58:45"
+            "time": "2017-01-10T14:58:45+00:00"
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@@ -1639,7 +1845,7 @@
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@@ -1683,7 +1889,7 @@
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             "description": "A security checker for your composer.lock",
-            "time": "2016-09-23 18:09:57"
+            "time": "2016-09-23T18:09:57+00:00"
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@@ -1737,7 +1943,7 @@
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-            "time": "2016-12-29 10:02:40"
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@@ -1797,7 +2003,7 @@
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-            "time": "2017-01-10 20:01:51"
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@@ -1850,25 +2056,83 @@
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-            "time": "2016-11-14 01:06:16"
+            "time": "2016-11-14T01:06:16+00:00"
+        },
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+            "version": "v1.13.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3"
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
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+            "suggest": {
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+            },
+            "type": "library",
+            "extra": {
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+                }
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