diff --git a/composer.lock b/composer.lock
index f87b3e8..40b062a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -942,25 +942,26 @@
         },
         {
             "name": "symfony/filesystem",
-            "version": "v3.2.7",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "64421e6479c4a8e60d790fb666bd520992861b66"
+                "reference": "00cdad0936d06fab136944bc2342b762b1c3a4a2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/64421e6479c4a8e60d790fb666bd520992861b66",
-                "reference": "64421e6479c4a8e60d790fb666bd520992861b66",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/00cdad0936d06fab136944bc2342b762b1c3a4a2",
+                "reference": "00cdad0936d06fab136944bc2342b762b1c3a4a2",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5.9"
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -987,7 +988,7 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2017-03-26T15:47:15+00:00"
+            "time": "2019-11-25T16:36:22+00:00"
         },
         {
             "name": "symfony/http-foundation",
@@ -1125,6 +1126,64 @@
             "homepage": "https://symfony.com",
             "time": "2017-04-05T12:52:03+00:00"
         },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.13.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.13-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2019-11-27T13:56:44+00:00"
+        },
         {
             "name": "symfony/polyfill-mbstring",
             "version": "v1.13.1",
@@ -1494,26 +1553,28 @@
         },
         {
             "name": "pdepend/pdepend",
-            "version": "2.5.0",
+            "version": "2.6.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/pdepend/pdepend.git",
-                "reference": "0c50874333149c0dad5a2877801aed148f2767ff"
+                "reference": "713e14e401d174882a5980446db1ba427922310b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/pdepend/pdepend/zipball/0c50874333149c0dad5a2877801aed148f2767ff",
-                "reference": "0c50874333149c0dad5a2877801aed148f2767ff",
+                "url": "https://api.github.com/repos/pdepend/pdepend/zipball/713e14e401d174882a5980446db1ba427922310b",
+                "reference": "713e14e401d174882a5980446db1ba427922310b",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.7",
-                "symfony/config": "^2.3.0|^3",
-                "symfony/dependency-injection": "^2.3.0|^3",
-                "symfony/filesystem": "^2.3.0|^3"
+                "symfony/config": "^2.3.0|^3|^4",
+                "symfony/dependency-injection": "^2.3.0|^3|^4",
+                "symfony/filesystem": "^2.3.0|^3|^4"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.4.0,<4.8",
+                "easy-doc/easy-doc": "0.0.0 || ^1.2.3",
+                "gregwar/rst": "^1.0",
+                "phpunit/phpunit": "^4.8.35|^5.7",
                 "squizlabs/php_codesniffer": "^2.0.0"
             },
             "bin": [
@@ -1530,7 +1591,7 @@
                 "BSD-3-Clause"
             ],
             "description": "Official version of pdepend to be handled with Composer",
-            "time": "2017-01-19T14:23:36+00:00"
+            "time": "2019-12-14T09:25:03+00:00"
         },
         {
             "name": "phpdocumentor/reflection-common",