diff --git a/.gitignore b/.gitignore
index 31a77e3..3e5e003 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 /vendor/
 /vendor-bin/*/vendor
 /documentation/
+/manual/
 /tests/coverage/
 /arsse.db*
 /config.php
diff --git a/lib/Conf.php b/lib/Conf.php
index bba5821..15a8345 100644
--- a/lib/Conf.php
+++ b/lib/Conf.php
@@ -286,7 +286,7 @@ class Conf {
                 }
                 switch (self::EXPECTED_TYPES[$key] ?? gettype($this->$key)) {
                     case "integer":
-                        return Value::normalize($value, Value::T_INT | $mode);
+                        return Value::normalize($value, Value::T_INT | $mode); // @codeCoverageIgnore
                     case "double":
                         return Value::normalize($value, Value::T_FLOAT | $mode);
                     case "string":
diff --git a/vendor-bin/csfixer/composer.lock b/vendor-bin/csfixer/composer.lock
index fe1d67e..f522cb4 100644
--- a/vendor-bin/csfixer/composer.lock
+++ b/vendor-bin/csfixer/composer.lock
@@ -114,30 +114,30 @@
         },
         {
             "name": "doctrine/annotations",
-            "version": "v1.4.0",
+            "version": "v1.6.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/annotations.git",
-                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97"
+                "reference": "c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/annotations/zipball/54cacc9b81758b14e3ce750f205a393d52339e97",
-                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5",
+                "reference": "c7f2050c68a9ab0bdb0f98567ec08d80ea7d24d5",
                 "shasum": ""
             },
             "require": {
                 "doctrine/lexer": "1.*",
-                "php": "^5.6 || ^7.0"
+                "php": "^7.1"
             },
             "require-dev": {
                 "doctrine/cache": "1.*",
-                "phpunit/phpunit": "^5.7"
+                "phpunit/phpunit": "^6.4"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4.x-dev"
+                    "dev-master": "1.6.x-dev"
                 }
             },
             "autoload": {
@@ -178,7 +178,7 @@
                 "docblock",
                 "parser"
             ],
-            "time": "2017-02-24T16:22:25+00:00"
+            "time": "2017-12-06T07:11:42+00:00"
         },
         {
             "name": "doctrine/lexer",
@@ -475,21 +475,21 @@
         },
         {
             "name": "symfony/console",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "a700b874d3692bc8342199adfb6d3b99f62cc61a"
+                "reference": "b0a03c1bb0fcbe288629956cf2f1dd3f1dc97522"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/a700b874d3692bc8342199adfb6d3b99f62cc61a",
-                "reference": "a700b874d3692bc8342199adfb6d3b99f62cc61a",
+                "url": "https://api.github.com/repos/symfony/console/zipball/b0a03c1bb0fcbe288629956cf2f1dd3f1dc97522",
+                "reference": "b0a03c1bb0fcbe288629956cf2f1dd3f1dc97522",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8",
-                "symfony/debug": "~2.8|~3.0|~4.0",
+                "php": "^7.1.3",
+                "symfony/contracts": "^1.0",
                 "symfony/polyfill-mbstring": "~1.0"
             },
             "conflict": {
@@ -498,11 +498,11 @@
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~3.3|~4.0",
+                "symfony/config": "~3.4|~4.0",
                 "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/event-dispatcher": "~2.8|~3.0|~4.0",
+                "symfony/event-dispatcher": "~3.4|~4.0",
                 "symfony/lock": "~3.4|~4.0",
-                "symfony/process": "~3.3|~4.0"
+                "symfony/process": "~3.4|~4.0"
             },
             "suggest": {
                 "psr/log-implementation": "For using the console logger",
@@ -513,7 +513,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -540,44 +540,48 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-04T04:42:43+00:00"
+            "time": "2019-01-04T15:13:53+00:00"
         },
         {
-            "name": "symfony/debug",
-            "version": "v3.4.21",
+            "name": "symfony/contracts",
+            "version": "v1.0.2",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/debug.git",
-                "reference": "26d7f23b9bd0b93bee5583e4d6ca5cb1ab31b186"
+                "url": "https://github.com/symfony/contracts.git",
+                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/debug/zipball/26d7f23b9bd0b93bee5583e4d6ca5cb1ab31b186",
-                "reference": "26d7f23b9bd0b93bee5583e4d6ca5cb1ab31b186",
+                "url": "https://api.github.com/repos/symfony/contracts/zipball/1aa7ab2429c3d594dd70689604b5cf7421254cdf",
+                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8",
-                "psr/log": "~1.0"
-            },
-            "conflict": {
-                "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
+                "php": "^7.1.3"
             },
             "require-dev": {
-                "symfony/http-kernel": "~2.8|~3.0|~4.0"
+                "psr/cache": "^1.0",
+                "psr/container": "^1.0"
+            },
+            "suggest": {
+                "psr/cache": "When using the Cache contracts",
+                "psr/container": "When using the Service contracts",
+                "symfony/cache-contracts-implementation": "",
+                "symfony/service-contracts-implementation": "",
+                "symfony/translation-contracts-implementation": ""
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "1.0-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Component\\Debug\\": ""
+                    "Symfony\\Contracts\\": ""
                 },
                 "exclude-from-classmap": [
-                    "/Tests/"
+                    "**/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -586,44 +590,53 @@
             ],
             "authors": [
                 {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony Debug Component",
+            "description": "A set of abstractions extracted out of the Symfony components",
             "homepage": "https://symfony.com",
-            "time": "2019-01-01T13:45:19+00:00"
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "time": "2018-12-05T08:06:11+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "d1cdd46c53c264a2bd42505bd0e8ce21423bd0e2"
+                "reference": "887de6d34c86cf0cb6cbf910afb170cdb743cb5e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/d1cdd46c53c264a2bd42505bd0e8ce21423bd0e2",
-                "reference": "d1cdd46c53c264a2bd42505bd0e8ce21423bd0e2",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/887de6d34c86cf0cb6cbf910afb170cdb743cb5e",
+                "reference": "887de6d34c86cf0cb6cbf910afb170cdb743cb5e",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8"
+                "php": "^7.1.3",
+                "symfony/contracts": "^1.0"
             },
             "conflict": {
-                "symfony/dependency-injection": "<3.3"
+                "symfony/dependency-injection": "<3.4"
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~2.8|~3.0|~4.0",
-                "symfony/dependency-injection": "~3.3|~4.0",
-                "symfony/expression-language": "~2.8|~3.0|~4.0",
-                "symfony/stopwatch": "~2.8|~3.0|~4.0"
+                "symfony/config": "~3.4|~4.0",
+                "symfony/dependency-injection": "~3.4|~4.0",
+                "symfony/expression-language": "~3.4|~4.0",
+                "symfony/stopwatch": "~3.4|~4.0"
             },
             "suggest": {
                 "symfony/dependency-injection": "",
@@ -632,7 +645,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -659,30 +672,30 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-01T18:08:36+00:00"
+            "time": "2019-01-05T16:37:49+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "c24ce3d18ccc9bb9d7e1d6ce9330fcc6061cafde"
+                "reference": "c2ffd9a93f2d6c5be2f68a0aa7953cc229f871f8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/c24ce3d18ccc9bb9d7e1d6ce9330fcc6061cafde",
-                "reference": "c24ce3d18ccc9bb9d7e1d6ce9330fcc6061cafde",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/c2ffd9a93f2d6c5be2f68a0aa7953cc229f871f8",
+                "reference": "c2ffd9a93f2d6c5be2f68a0aa7953cc229f871f8",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8",
+                "php": "^7.1.3",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -709,29 +722,29 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-01T13:45:19+00:00"
+            "time": "2019-01-03T09:07:35+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "3f2a2ab6315dd7682d4c16dcae1e7b95c8b8555e"
+                "reference": "9094d69e8c6ee3fe186a0ec5a4f1401e506071ce"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/3f2a2ab6315dd7682d4c16dcae1e7b95c8b8555e",
-                "reference": "3f2a2ab6315dd7682d4c16dcae1e7b95c8b8555e",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/9094d69e8c6ee3fe186a0ec5a4f1401e506071ce",
+                "reference": "9094d69e8c6ee3fe186a0ec5a4f1401e506071ce",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8"
+                "php": "^7.1.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -758,29 +771,29 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-01T13:45:19+00:00"
+            "time": "2019-01-03T09:07:35+00:00"
         },
         {
             "name": "symfony/options-resolver",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/options-resolver.git",
-                "reference": "8a10e36ffd04c0c551051594952304d34ecece71"
+                "reference": "fbcb106aeee72f3450298bf73324d2cc00d083d1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/8a10e36ffd04c0c551051594952304d34ecece71",
-                "reference": "8a10e36ffd04c0c551051594952304d34ecece71",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/fbcb106aeee72f3450298bf73324d2cc00d083d1",
+                "reference": "fbcb106aeee72f3450298bf73324d2cc00d083d1",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8"
+                "php": "^7.1.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -812,7 +825,7 @@
                 "configuration",
                 "options"
             ],
-            "time": "2019-01-01T13:45:19+00:00"
+            "time": "2019-01-03T09:07:35+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -1047,25 +1060,25 @@
         },
         {
             "name": "symfony/process",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "0d41dd7d95ed179aed6a13393b0f4f97bfa2d25c"
+                "reference": "ea043ab5d8ed13b467a9087d81cb876aee7f689a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/0d41dd7d95ed179aed6a13393b0f4f97bfa2d25c",
-                "reference": "0d41dd7d95ed179aed6a13393b0f4f97bfa2d25c",
+                "url": "https://api.github.com/repos/symfony/process/zipball/ea043ab5d8ed13b467a9087d81cb876aee7f689a",
+                "reference": "ea043ab5d8ed13b467a9087d81cb876aee7f689a",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8"
+                "php": "^7.1.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -1092,29 +1105,30 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-02T21:24:08+00:00"
+            "time": "2019-01-03T14:48:52+00:00"
         },
         {
             "name": "symfony/stopwatch",
-            "version": "v3.4.21",
+            "version": "v4.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "af55d31cb58c5452d2c160655fa1968b872a8084"
+                "reference": "af62b35760fc92c8dbdce659b4eebdfe0e6a0472"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/af55d31cb58c5452d2c160655fa1968b872a8084",
-                "reference": "af55d31cb58c5452d2c160655fa1968b872a8084",
+                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/af62b35760fc92c8dbdce659b4eebdfe0e6a0472",
+                "reference": "af62b35760fc92c8dbdce659b4eebdfe0e6a0472",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8"
+                "php": "^7.1.3",
+                "symfony/contracts": "^1.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4-dev"
+                    "dev-master": "4.2-dev"
                 }
             },
             "autoload": {
@@ -1141,7 +1155,7 @@
             ],
             "description": "Symfony Stopwatch Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-01T13:45:19+00:00"
+            "time": "2019-01-03T09:07:35+00:00"
         }
     ],
     "packages-dev": [],
diff --git a/vendor-bin/phpunit/composer.json b/vendor-bin/phpunit/composer.json
index 2fe20f7..e0854a6 100644
--- a/vendor-bin/phpunit/composer.json
+++ b/vendor-bin/phpunit/composer.json
@@ -1,6 +1,6 @@
 {
     "require": {
-        "phpunit/phpunit": "^6.5",
+        "phpunit/phpunit": "*",
         "phake/phake": "^3.0",
         "clue/arguments": "^2.0",
         "mikey179/vfsStream": "^1.6",
diff --git a/vendor-bin/phpunit/composer.lock b/vendor-bin/phpunit/composer.lock
index 53d62ca..88d83a5 100644
--- a/vendor-bin/phpunit/composer.lock
+++ b/vendor-bin/phpunit/composer.lock
@@ -1,10 +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"
     ],
-    "content-hash": "4252b3d7817c9a4a5f60ac81f28202e2",
+    "content-hash": "5c03bb6fb595eebc1bb3e5fe9ea7c4a0",
     "packages": [
         {
             "name": "clue/arguments",
@@ -58,32 +58,32 @@
         },
         {
             "name": "doctrine/instantiator",
-            "version": "1.0.5",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
+                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
-                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3,<8.0-DEV"
+                "php": "^7.1"
             },
             "require-dev": {
                 "athletic/athletic": "~0.1.8",
                 "ext-pdo": "*",
                 "ext-phar": "*",
-                "phpunit/phpunit": "~4.0",
-                "squizlabs/php_codesniffer": "~2.0"
+                "phpunit/phpunit": "^6.2.3",
+                "squizlabs/php_codesniffer": "^3.0.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "1.2.x-dev"
                 }
             },
             "autoload": {
@@ -108,7 +108,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2015-06-14T21:17:01+00:00"
+            "time": "2017-07-22T11:58:36+00:00"
         },
         {
             "name": "mikey179/vfsStream",
@@ -158,25 +158,28 @@
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.7.0",
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-                "reference": "cd0871b3975fb7fc44d11314fd1ee20925fce4f5",
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+                "reference": "febd209a219cea7b56ad799b30ebbea34b71eb8f",
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             },
             "require": {
-                "php": "^7.0"
+                "php": "^7.1"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.1"
+                "phpunit/phpunit": "^7.4"
             },
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             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.1.x-dev"
+                    "dev-master": "4.0-dev"
                 }
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             "autoload": {
@@ -1177,7 +1128,7 @@
                 "environment",
                 "hhvm"
             ],
-            "time": "2017-07-01T08:51:00+00:00"
+            "time": "2018-11-25T09:31:21+00:00"
         },
         {
             "name": "sebastian/exporter",
@@ -1444,25 +1395,25 @@
         },
         {
             "name": "sebastian/resource-operations",
-            "version": "1.0.0",
+            "version": "2.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/resource-operations.git",
-                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
+                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9"
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-                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
+                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.6.0"
+                "php": "^7.1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "2.0-dev"
                 }
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             "autoload": {
@@ -1482,7 +1433,7 @@
             ],
             "description": "Provides a list of PHP built-in functions that operate on resources",
             "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
-            "time": "2015-07-28T20:34:47+00:00"
+            "time": "2018-10-04T04:07:39+00:00"
         },
         {
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@@ -1527,6 +1478,64 @@
             "homepage": "https://github.com/sebastianbergmann/version",
             "time": "2016-10-03T07:35:21+00:00"
         },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.10.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "e3d826245268269cd66f8326bd8bc066687b4a19"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/e3d826245268269cd66f8326bd8bc066687b4a19",
+                "reference": "e3d826245268269cd66f8326bd8bc066687b4a19",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.9-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                },
+                {
+                    "name": "Gert de Pagter",
+                    "email": "backendtea@gmail.com"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2018-08-06T14:22:27+00:00"
+        },
         {
             "name": "theseer/tokenizer",
             "version": "1.1.0",
@@ -1569,20 +1578,21 @@
         },
         {
             "name": "webmozart/assert",
-            "version": "1.3.0",
+            "version": "1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9"
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                 "type": "zip",
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-                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/83e253c8e0be5b0257b881e1827274667c5c17a9",
+                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.3 || ^7.0"
+                "php": "^5.3.3 || ^7.0",
+                "symfony/polyfill-ctype": "^1.8"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.6",
@@ -1615,7 +1625,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2018-01-29T19:49:41+00:00"
+            "time": "2018-12-25T11:19:39+00:00"
         },
         {
             "name": "webmozart/glob",
diff --git a/vendor-bin/robo/composer.lock b/vendor-bin/robo/composer.lock
index 09a7ac7..123dceb 100644
--- a/vendor-bin/robo/composer.lock
+++ b/vendor-bin/robo/composer.lock
@@ -1,23 +1,23 @@
 {
     "_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"
     ],
     "content-hash": "87a37068875d67919f797af9dc08e108",
     "packages": [
         {
             "name": "consolidation/annotated-command",
-            "version": "2.10.0",
+            "version": "2.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/consolidation/annotated-command.git",
-                "reference": "8e7d1a05230dc1159c751809e98b74f2b7f71873"
+                "reference": "edea407f57104ed518cc3c3b47d5b84403ee267a"
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-                "reference": "8e7d1a05230dc1159c751809e98b74f2b7f71873",
+                "url": "https://api.github.com/repos/consolidation/annotated-command/zipball/edea407f57104ed518cc3c3b47d5b84403ee267a",
+                "reference": "edea407f57104ed518cc3c3b47d5b84403ee267a",
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@@ -29,13 +29,57 @@
                 "symfony/finder": "^2.5|^3|^4"
             },
             "require-dev": {
-                "g1a/composer-test-scenarios": "^2",
+                "g1a/composer-test-scenarios": "^3",
+                "php-coveralls/php-coveralls": "^1",
                 "phpunit/phpunit": "^6",
-                "satooshi/php-coveralls": "^2",
                 "squizlabs/php_codesniffer": "^2.7"
             },
             "type": "library",
             "extra": {
+                "scenarios": {
+                    "symfony4": {
+                        "require": {
+                            "symfony/console": "^4.0"
+                        },
+                        "config": {
+                            "platform": {
+                                "php": "7.1.3"
+                            }
+                        }
+                    },
+                    "symfony2": {
+                        "require": {
+                            "symfony/console": "^2.8"
+                        },
+                        "require-dev": {
+                            "phpunit/phpunit": "^4.8.36"
+                        },
+                        "remove": [
+                            "php-coveralls/php-coveralls"
+                        ],
+                        "config": {
+                            "platform": {
+                                "php": "5.4.8"
+                            }
+                        },
+                        "scenario-options": {
+                            "create-lockfile": "false"
+                        }
+                    },
+                    "phpunit4": {
+                        "require-dev": {
+                            "phpunit/phpunit": "^4.8.36"
+                        },
+                        "remove": [
+                            "php-coveralls/php-coveralls"
+                        ],
+                        "config": {
+                            "platform": {
+                                "php": "5.4.8"
+                            }
+                        }
+                    }
+                },
                 "branch-alias": {
                     "dev-master": "2.x-dev"
                 }
@@ -56,7 +100,7 @@
                 }
             ],
             "description": "Initialize Symfony Console commands from annotated command class methods.",
-            "time": "2018-11-15T01:46:18+00:00"
+            "time": "2018-12-29T04:43:17+00:00"
         },
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             "name": "consolidation/config",
@@ -114,31 +158,72 @@
         },
         {
             "name": "consolidation/log",
-            "version": "1.0.6",
+            "version": "1.1.1",
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                 "type": "git",
                 "url": "https://github.com/consolidation/log.git",
-                "reference": "dfd8189a771fe047bf3cd669111b2de5f1c79395"
+                "reference": "b2e887325ee90abc96b0a8b7b474cd9e7c896e3a"
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-                "reference": "dfd8189a771fe047bf3cd669111b2de5f1c79395",
+                "url": "https://api.github.com/repos/consolidation/log/zipball/b2e887325ee90abc96b0a8b7b474cd9e7c896e3a",
+                "reference": "b2e887325ee90abc96b0a8b7b474cd9e7c896e3a",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5.0",
-                "psr/log": "~1.0",
+                "php": ">=5.4.5",
+                "psr/log": "^1.0",
                 "symfony/console": "^2.8|^3|^4"
             },
             "require-dev": {
-                "g1a/composer-test-scenarios": "^1",
-                "phpunit/phpunit": "4.*",
-                "satooshi/php-coveralls": "^2",
-                "squizlabs/php_codesniffer": "2.*"
+                "g1a/composer-test-scenarios": "^3",
+                "php-coveralls/php-coveralls": "^1",
+                "phpunit/phpunit": "^6",
+                "squizlabs/php_codesniffer": "^2"
             },
             "type": "library",
             "extra": {
+                "scenarios": {
+                    "symfony4": {
+                        "require": {
+                            "symfony/console": "^4.0"
+                        },
+                        "config": {
+                            "platform": {
+                                "php": "7.1.3"
+                            }
+                        }
+                    },
+                    "symfony2": {
+                        "require": {
+                            "symfony/console": "^2.8"
+                        },
+                        "require-dev": {
+                            "phpunit/phpunit": "^4.8.36"
+                        },
+                        "remove": [
+                            "php-coveralls/php-coveralls"
+                        ],
+                        "config": {
+                            "platform": {
+                                "php": "5.4.8"
+                            }
+                        }
+                    },
+                    "phpunit4": {
+                        "require-dev": {
+                            "phpunit/phpunit": "^4.8.36"
+                        },
+                        "remove": [
+                            "php-coveralls/php-coveralls"
+                        ],
+                        "config": {
+                            "platform": {
+                                "php": "5.4.8"
+                            }
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+                    }
+                },
                 "branch-alias": {
                     "dev-master": "1.x-dev"
                 }
@@ -159,7 +244,7 @@
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             ],
             "description": "Improved Psr-3 / Psr\\Log logger based on Symfony Console components.",
-            "time": "2018-05-25T18:14:39+00:00"
+            "time": "2019-01-01T17:30:51+00:00"
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@@ -219,20 +304,20 @@
         },
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             "name": "consolidation/robo",
-            "version": "1.3.2",
+            "version": "1.4.3",
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                 "url": "https://github.com/consolidation/Robo.git",
-                "reference": "a9bd9ecf00751aa92754903c0d17612c4e840ce8"
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-                "reference": "a9bd9ecf00751aa92754903c0d17612c4e840ce8",
+                "url": "https://api.github.com/repos/consolidation/Robo/zipball/d0b6f516ec940add7abed4f1432d30cca5f8ae0c",
+                "reference": "d0b6f516ec940add7abed4f1432d30cca5f8ae0c",
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@@ -304,7 +389,7 @@
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-                    "dev-master": "1.x-dev"
+                    "dev-master": "2.x-dev"
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@@ -323,7 +408,7 @@
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             ],
             "description": "Modern task runner",
-            "time": "2018-11-22T05:43:44+00:00"
+            "time": "2019-01-02T21:33:28+00:00"
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@@ -627,16 +712,16 @@
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-            "version": "1.4.3",
+            "version": "1.4.5",
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                 "url": "https://github.com/pear/Archive_Tar.git",
-                "reference": "43455c960da70e655c6bdf8ea2bc8cc1a6034afb"
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-                "reference": "43455c960da70e655c6bdf8ea2bc8cc1a6034afb",
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@@ -647,8 +732,8 @@
                 "phpunit/phpunit": "*"
             },
             "suggest": {
-                "ext-bz2": "bz2 compression support.",
-                "ext-xz": "lzma2 compression support.",
+                "ext-bz2": "Bz2 compression support.",
+                "ext-xz": "Lzma2 compression support.",
                 "ext-zlib": "Gzip compression support."
             },
             "type": "library",
@@ -683,13 +768,13 @@
                     "email": "mrook@php.net"
                 }
             ],
-            "description": "Tar file management class",
+            "description": "Tar file management class with compression support (gzip, bzip2, lzma2)",
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                 "archive",
                 "tar"
             ],
-            "time": "2017-06-11T17:28:11+00:00"
+            "time": "2019-01-02T21:45:13+00:00"
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@@ -740,20 +825,20 @@
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-            "version": "v1.10.6",
+            "version": "v1.10.7",
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                 "url": "https://github.com/pear/pear-core-minimal.git",
-                "reference": "052868b244d31f822796e7e9981f62557eb256d4"
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             },
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+                "pear/console_getopt": "~1.4",
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@@ -780,7 +865,7 @@
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             "description": "Minimal set of PEAR core files to be used as composer dependency",
-            "time": "2018-08-22T19:28:09+00:00"
+            "time": "2018-12-05T20:03:52+00:00"
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@@ -935,21 +1020,21 @@
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+            "version": "v4.2.2",
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@@ -958,11 +1043,11 @@
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-                "symfony/event-dispatcher": "~2.8|~3.0|~4.0",
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@@ -973,7 +1058,7 @@
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@@ -1000,44 +1085,48 @@
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-            "time": "2018-10-30T16:50:50+00:00"
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@@ -1169,29 +1267,29 @@
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@@ -1339,16 +1437,16 @@
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