diff --git a/.gitattributes b/.gitattributes
index 16d8d2934..2caf5250e 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -6,5 +6,6 @@
 /docs/ export-ignore
 /mkdocs.yml export-ignore
 /phpcs.xml export-ignore
+/phpstan.neon.dist export-ignore
 /phpunit.xml.dist export-ignore
 /test/ export-ignore
diff --git a/.gitignore b/.gitignore
index e8235c0bd..b195311ea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 /clover.xml
 /coveralls-upload.json
 /docs/html/
+/phpstan.neon
 /phpunit.xml
 /vendor/
 /zf-mkdoc-theme.tgz
diff --git a/composer.json b/composer.json
index 1ad7b9081..c9e932a37 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,7 @@
     },
     "require-dev": {
         "http-interop/http-middleware": "^0.4.1",
+        "phpstan/phpstan": "~0.11.1",
         "phpunit/phpunit": "^8.0",
         "webimpress/coding-standard": "dev-master",
         "zendframework/zend-coding-standard": "2.0.0-alpha.3",
@@ -77,6 +78,7 @@
         ],
         "cs-check": "phpcs",
         "cs-fix": "phpcbf",
+        "phpstan": "phpstan analyse",
         "test": "phpunit --colors=always",
         "test-coverage": "phpunit --colors=always --coverage-clover clover.xml"
     }
diff --git a/composer.lock b/composer.lock
index 186aab1df..bbeac552f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "eff7d85e20f5a16fcf0324a9adfcd819",
+    "content-hash": "48aba7809df77bb9f1a144e7d67960fb",
     "packages": [
         {
             "name": "container-interop/container-interop",
@@ -840,6 +840,50 @@
         }
     ],
     "packages-dev": [
+        {
+            "name": "composer/xdebug-handler",
+            "version": "1.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/xdebug-handler.git",
+                "reference": "d17708133b6c276d6e42ef887a877866b909d892"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/d17708133b6c276d6e42ef887a877866b909d892",
+                "reference": "d17708133b6c276d6e42ef887a877866b909d892",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.2 || ^7.0",
+                "psr/log": "^1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Composer\\XdebugHandler\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "John Stevenson",
+                    "email": "john-stevenson@blueyonder.co.uk"
+                }
+            ],
+            "description": "Restarts a process without xdebug.",
+            "keywords": [
+                "Xdebug",
+                "performance"
+            ],
+            "time": "2019-01-28T20:25:53+00:00"
+        },
         {
             "name": "dealerdirect/phpcodesniffer-composer-installer",
             "version": "v0.5.0",
@@ -1013,6 +1057,57 @@
             "abandoned": "http-interop/http-server-middleware",
             "time": "2017-01-14T15:23:42+00:00"
         },
+        {
+            "name": "jean85/pretty-package-versions",
+            "version": "1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Jean85/pretty-package-versions.git",
+                "reference": "75c7effcf3f77501d0e0caa75111aff4daa0dd48"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Jean85/pretty-package-versions/zipball/75c7effcf3f77501d0e0caa75111aff4daa0dd48",
+                "reference": "75c7effcf3f77501d0e0caa75111aff4daa0dd48",
+                "shasum": ""
+            },
+            "require": {
+                "ocramius/package-versions": "^1.2.0",
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Jean85\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Alessandro Lai",
+                    "email": "alessandro.lai85@gmail.com"
+                }
+            ],
+            "description": "A wrapper for ocramius/package-versions to get pretty versions strings",
+            "keywords": [
+                "composer",
+                "package",
+                "release",
+                "versions"
+            ],
+            "time": "2018-06-13T13:22:40+00:00"
+        },
         {
             "name": "myclabs/deep-copy",
             "version": "1.8.1",
@@ -1061,6 +1156,583 @@
             ],
             "time": "2018-06-11T23:09:50+00:00"
         },
+        {
+            "name": "nette/bootstrap",
+            "version": "v2.4.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/bootstrap.git",
+                "reference": "268816e3f1bb7426c3a4ceec2bd38a036b532543"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/bootstrap/zipball/268816e3f1bb7426c3a4ceec2bd38a036b532543",
+                "reference": "268816e3f1bb7426c3a4ceec2bd38a036b532543",
+                "shasum": ""
+            },
+            "require": {
+                "nette/di": "~2.4.7",
+                "nette/utils": "~2.4",
+                "php": ">=5.6.0"
+            },
+            "conflict": {
+                "nette/nette": "<2.2"
+            },
+            "require-dev": {
+                "latte/latte": "~2.2",
+                "nette/application": "~2.3",
+                "nette/caching": "~2.3",
+                "nette/database": "~2.3",
+                "nette/forms": "~2.3",
+                "nette/http": "~2.4.0",
+                "nette/mail": "~2.3",
+                "nette/robot-loader": "^2.4.2 || ^3.0",
+                "nette/safe-stream": "~2.2",
+                "nette/security": "~2.3",
+                "nette/tester": "~2.0",
+                "tracy/tracy": "^2.4.1"
+            },
+            "suggest": {
+                "nette/robot-loader": "to use Configurator::createRobotLoader()",
+                "tracy/tracy": "to use Configurator::enableTracy()"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.4-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "🅱 Nette Bootstrap: the simple way to configure and bootstrap your Nette application.",
+            "homepage": "https://nette.org",
+            "keywords": [
+                "bootstrapping",
+                "configurator",
+                "nette"
+            ],
+            "time": "2018-05-17T12:52:20+00:00"
+        },
+        {
+            "name": "nette/di",
+            "version": "v2.4.15",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/di.git",
+                "reference": "d0561b8f77e8ef2ed6d83328860e16c81a5a8649"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/di/zipball/d0561b8f77e8ef2ed6d83328860e16c81a5a8649",
+                "reference": "d0561b8f77e8ef2ed6d83328860e16c81a5a8649",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "nette/neon": "^2.3.3 || ~3.0.0",
+                "nette/php-generator": "^2.6.1 || ^3.0.0",
+                "nette/utils": "^2.5.0 || ~3.0.0",
+                "php": ">=5.6.0"
+            },
+            "conflict": {
+                "nette/bootstrap": "<2.4",
+                "nette/nette": "<2.2"
+            },
+            "require-dev": {
+                "nette/tester": "^2.0",
+                "tracy/tracy": "^2.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.4-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "💎 Nette Dependency Injection Container: Flexible, compiled and full-featured DIC with perfectly usable autowiring and support for all new PHP 7.1 features.",
+            "homepage": "https://nette.org",
+            "keywords": [
+                "compiled",
+                "di",
+                "dic",
+                "factory",
+                "ioc",
+                "nette",
+                "static"
+            ],
+            "time": "2019-01-30T13:26:05+00:00"
+        },
+        {
+            "name": "nette/finder",
+            "version": "v2.4.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/finder.git",
+                "reference": "ee951a656cb8ac622e5dd33474a01fd2470505a0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/finder/zipball/ee951a656cb8ac622e5dd33474a01fd2470505a0",
+                "reference": "ee951a656cb8ac622e5dd33474a01fd2470505a0",
+                "shasum": ""
+            },
+            "require": {
+                "nette/utils": "~2.4",
+                "php": ">=5.6.0"
+            },
+            "conflict": {
+                "nette/nette": "<2.2"
+            },
+            "require-dev": {
+                "nette/tester": "~2.0",
+                "tracy/tracy": "^2.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.4-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "🔍 Nette Finder: find files and directories with an intuitive API.",
+            "homepage": "https://nette.org",
+            "keywords": [
+                "filesystem",
+                "glob",
+                "iterator",
+                "nette"
+            ],
+            "time": "2018-06-28T11:49:23+00:00"
+        },
+        {
+            "name": "nette/neon",
+            "version": "v2.4.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/neon.git",
+                "reference": "5e72b1dd3e2d34f0863c5561139a19df6a1ef398"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/neon/zipball/5e72b1dd3e2d34f0863c5561139a19df6a1ef398",
+                "reference": "5e72b1dd3e2d34f0863c5561139a19df6a1ef398",
+                "shasum": ""
+            },
+            "require": {
+                "ext-iconv": "*",
+                "ext-json": "*",
+                "php": ">=5.6.0"
+            },
+            "require-dev": {
+                "nette/tester": "~2.0",
+                "tracy/tracy": "^2.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.4-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "🍸 Nette NEON: encodes and decodes NEON file format.",
+            "homepage": "http://ne-on.org",
+            "keywords": [
+                "export",
+                "import",
+                "neon",
+                "nette",
+                "yaml"
+            ],
+            "time": "2018-03-21T12:12:21+00:00"
+        },
+        {
+            "name": "nette/php-generator",
+            "version": "v3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/php-generator.git",
+                "reference": "9de4e093a130f7a1bd175198799ebc0efbac6924"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/php-generator/zipball/9de4e093a130f7a1bd175198799ebc0efbac6924",
+                "reference": "9de4e093a130f7a1bd175198799ebc0efbac6924",
+                "shasum": ""
+            },
+            "require": {
+                "nette/utils": "^2.4.2 || ~3.0.0",
+                "php": ">=7.1"
+            },
+            "conflict": {
+                "nette/nette": "<2.2"
+            },
+            "require-dev": {
+                "nette/tester": "^2.0",
+                "tracy/tracy": "^2.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.2-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "🐘 Nette PHP Generator: generates neat PHP code for you. Supports new PHP 7.3 features.",
+            "homepage": "https://nette.org",
+            "keywords": [
+                "code",
+                "nette",
+                "php",
+                "scaffolding"
+            ],
+            "time": "2018-11-27T19:00:14+00:00"
+        },
+        {
+            "name": "nette/robot-loader",
+            "version": "v3.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/robot-loader.git",
+                "reference": "fc76c70e740b10f091e502b2e393d0be912f38d4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/robot-loader/zipball/fc76c70e740b10f091e502b2e393d0be912f38d4",
+                "reference": "fc76c70e740b10f091e502b2e393d0be912f38d4",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "nette/finder": "^2.3 || ^3.0",
+                "nette/utils": "^2.4 || ^3.0",
+                "php": ">=5.6.0"
+            },
+            "conflict": {
+                "nette/nette": "<2.2"
+            },
+            "require-dev": {
+                "nette/tester": "^2.0",
+                "tracy/tracy": "^2.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "🍀 Nette RobotLoader: high performance and comfortable autoloader that will search and autoload classes within your application.",
+            "homepage": "https://nette.org",
+            "keywords": [
+                "autoload",
+                "class",
+                "interface",
+                "nette",
+                "trait"
+            ],
+            "time": "2018-08-13T14:19:06+00:00"
+        },
+        {
+            "name": "nette/utils",
+            "version": "v2.5.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nette/utils.git",
+                "reference": "17b9f76f2abd0c943adfb556e56f2165460b15ce"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nette/utils/zipball/17b9f76f2abd0c943adfb556e56f2165460b15ce",
+                "reference": "17b9f76f2abd0c943adfb556e56f2165460b15ce",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6.0"
+            },
+            "conflict": {
+                "nette/nette": "<2.2"
+            },
+            "require-dev": {
+                "nette/tester": "~2.0",
+                "tracy/tracy": "^2.3"
+            },
+            "suggest": {
+                "ext-gd": "to use Image",
+                "ext-iconv": "to use Strings::webalize() and toAscii()",
+                "ext-intl": "for script transliteration in Strings::webalize() and toAscii()",
+                "ext-json": "to use Nette\\Utils\\Json",
+                "ext-mbstring": "to use Strings::lower() etc...",
+                "ext-xml": "to use Strings::length() etc. when mbstring is not available"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.5-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ],
+                "files": [
+                    "src/loader.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause",
+                "GPL-2.0",
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "David Grudl",
+                    "homepage": "https://davidgrudl.com"
+                },
+                {
+                    "name": "Nette Community",
+                    "homepage": "https://nette.org/contributors"
+                }
+            ],
+            "description": "🛠 Nette Utils: lightweight utilities for string & array manipulation, image handling, safe JSON encoding/decoding, validation, slug or strong password generating etc.",
+            "homepage": "https://nette.org",
+            "keywords": [
+                "array",
+                "core",
+                "datetime",
+                "images",
+                "json",
+                "nette",
+                "paginator",
+                "password",
+                "slugify",
+                "string",
+                "unicode",
+                "utf-8",
+                "utility",
+                "validation"
+            ],
+            "time": "2018-09-18T10:22:16+00:00"
+        },
+        {
+            "name": "nikic/php-parser",
+            "version": "v4.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nikic/PHP-Parser.git",
+                "reference": "594bcae1fc0bccd3993d2f0d61a018e26ac2865a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/594bcae1fc0bccd3993d2f0d61a018e26ac2865a",
+                "reference": "594bcae1fc0bccd3993d2f0d61a018e26ac2865a",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "php": ">=7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.5 || ^7.0"
+            },
+            "bin": [
+                "bin/php-parse"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PhpParser\\": "lib/PhpParser"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
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+                    "name": "Nikita Popov"
+                }
+            ],
+            "description": "A PHP parser written in PHP",
+            "keywords": [
+                "parser",
+                "php"
+            ],
+            "time": "2019-01-12T16:31:37+00:00"
+        },
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+            "version": "1.3.0",
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+                "url": "https://github.com/Ocramius/PackageVersions.git",
+                "reference": "4489d5002c49d55576fa0ba786f42dbb009be46f"
+            },
+            "dist": {
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+                "url": "https://api.github.com/repos/Ocramius/PackageVersions/zipball/4489d5002c49d55576fa0ba786f42dbb009be46f",
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+            "require-dev": {
+                "composer/composer": "^1.6.3",
+                "ext-zip": "*",
+                "infection/infection": "^0.7.1",
+                "phpunit/phpunit": "^7.0.0"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "PackageVersions\\Installer",
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PackageVersions\\": "src/PackageVersions"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com"
+                }
+            ],
+            "description": "Composer plugin that provides efficient querying for installed package versions (no runtime IO)",
+            "time": "2018-02-05T13:05:30+00:00"
+        },
         {
             "name": "phar-io/manifest",
             "version": "1.0.3",
@@ -1287,18 +1959,132 @@
                 "phpdocumentor/reflection-common": "^1.0"
             },
             "require-dev": {
-                "mockery/mockery": "^0.9.4",
-                "phpunit/phpunit": "^5.2||^4.8.24"
+                "mockery/mockery": "^0.9.4",
+                "phpunit/phpunit": "^5.2||^4.8.24"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "time": "2017-07-14T14:27:02+00:00"
+        },
+        {
+            "name": "phpspec/prophecy",
+            "version": "1.8.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpspec/prophecy.git",
+                "reference": "4ba436b55987b4bf311cb7c6ba82aa528aac0a06"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/4ba436b55987b4bf311cb7c6ba82aa528aac0a06",
+                "reference": "4ba436b55987b4bf311cb7c6ba82aa528aac0a06",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/instantiator": "^1.0.2",
+                "php": "^5.3|^7.0",
+                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2|^4.0",
+                "sebastian/comparator": "^1.1|^2.0|^3.0",
+                "sebastian/recursion-context": "^1.0|^2.0|^3.0"
+            },
+            "require-dev": {
+                "phpspec/phpspec": "^2.5|^3.2",
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5 || ^7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.8.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Prophecy\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Konstantin Kudryashov",
+                    "email": "ever.zet@gmail.com",
+                    "homepage": "http://everzet.com"
+                },
+                {
+                    "name": "Marcello Duarte",
+                    "email": "marcello.duarte@gmail.com"
+                }
+            ],
+            "description": "Highly opinionated mocking framework for PHP 5.3+",
+            "homepage": "https://github.com/phpspec/prophecy",
+            "keywords": [
+                "Double",
+                "Dummy",
+                "fake",
+                "mock",
+                "spy",
+                "stub"
+            ],
+            "time": "2018-08-05T17:53:17+00:00"
+        },
+        {
+            "name": "phpstan/phpdoc-parser",
+            "version": "0.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/phpdoc-parser.git",
+                "reference": "2cc49f47c69b023eaf05b48e6529389893b13d74"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpdoc-parser/zipball/2cc49f47c69b023eaf05b48e6529389893b13d74",
+                "reference": "2cc49f47c69b023eaf05b48e6529389893b13d74",
+                "shasum": ""
+            },
+            "require": {
+                "php": "~7.1"
+            },
+            "require-dev": {
+                "consistence/coding-standard": "^2.0.0",
+                "jakub-onderka/php-parallel-lint": "^0.9.2",
+                "phing/phing": "^2.16.0",
+                "phpstan/phpstan": "^0.10",
+                "phpunit/phpunit": "^6.3",
+                "slevomat/coding-standard": "^3.3.0",
+                "symfony/process": "^3.4 || ^4.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "0.3-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "phpDocumentor\\Reflection\\": [
+                    "PHPStan\\PhpDocParser\\": [
                         "src/"
                     ]
                 }
@@ -1307,76 +2093,81 @@
             "license": [
                 "MIT"
             ],
-            "authors": [
-                {
-                    "name": "Mike van Riel",
-                    "email": "me@mikevanriel.com"
-                }
-            ],
-            "time": "2017-07-14T14:27:02+00:00"
+            "description": "PHPDoc parser with support for nullable, intersection and generic types",
+            "time": "2019-01-14T12:26:23+00:00"
         },
         {
-            "name": "phpspec/prophecy",
-            "version": "1.8.0",
+            "name": "phpstan/phpstan",
+            "version": "0.11.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "4ba436b55987b4bf311cb7c6ba82aa528aac0a06"
+                "url": "https://github.com/phpstan/phpstan.git",
+                "reference": "a138b8a2731b2c19f1dffa2f1411984a638fe977"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/4ba436b55987b4bf311cb7c6ba82aa528aac0a06",
-                "reference": "4ba436b55987b4bf311cb7c6ba82aa528aac0a06",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/a138b8a2731b2c19f1dffa2f1411984a638fe977",
+                "reference": "a138b8a2731b2c19f1dffa2f1411984a638fe977",
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-                "php": "^5.3|^7.0",
-                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2|^4.0",
-                "sebastian/comparator": "^1.1|^2.0|^3.0",
-                "sebastian/recursion-context": "^1.0|^2.0|^3.0"
+                "composer/xdebug-handler": "^1.3.0",
+                "jean85/pretty-package-versions": "^1.0.3",
+                "nette/bootstrap": "^2.4 || ^3.0",
+                "nette/di": "^2.4.7 || ^3.0",
+                "nette/robot-loader": "^3.0.1",
+                "nette/utils": "^2.4.5 || ^3.0",
+                "nikic/php-parser": "^4.0.2",
+                "php": "~7.1",
+                "phpstan/phpdoc-parser": "^0.3",
+                "symfony/console": "~3.2 || ~4.0",
+                "symfony/finder": "~3.2 || ~4.0"
+            },
+            "conflict": {
+                "symfony/console": "3.4.16 || 4.1.5"
             },
             "require-dev": {
-                "phpspec/phpspec": "^2.5|^3.2",
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5 || ^7.1"
+                "brianium/paratest": "^2.0",
+                "consistence/coding-standard": "^3.5",
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.4.4",
+                "ext-intl": "*",
+                "ext-mysqli": "*",
+                "ext-soap": "*",
+                "ext-zip": "*",
+                "jakub-onderka/php-parallel-lint": "^1.0",
+                "localheinz/composer-normalize": "^1.1.0",
+                "phing/phing": "^2.16.0",
+                "phpstan/phpstan-deprecation-rules": "^0.11",
+                "phpstan/phpstan-php-parser": "^0.11",
+                "phpstan/phpstan-phpunit": "^0.11",
+                "phpstan/phpstan-strict-rules": "^0.11",
+                "phpunit/phpunit": "^7.0",
+                "slevomat/coding-standard": "^4.7.2",
+                "squizlabs/php_codesniffer": "^3.3.2"
             },
+            "bin": [
+                "bin/phpstan"
+            ],
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.8.x-dev"
+                    "dev-master": "0.11-dev"
                 }
             },
             "autoload": {
-                "psr-0": {
-                    "Prophecy\\": "src/"
+                "psr-4": {
+                    "PHPStan\\": [
+                        "src/",
+                        "build/PHPStan"
+                    ]
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
                 "MIT"
             ],
-            "authors": [
-                {
-                    "name": "Konstantin Kudryashov",
-                    "email": "ever.zet@gmail.com",
-                    "homepage": "http://everzet.com"
-                },
-                {
-                    "name": "Marcello Duarte",
-                    "email": "marcello.duarte@gmail.com"
-                }
-            ],
-            "description": "Highly opinionated mocking framework for PHP 5.3+",
-            "homepage": "https://github.com/phpspec/prophecy",
-            "keywords": [
-                "Double",
-                "Dummy",
-                "fake",
-                "mock",
-                "spy",
-                "stub"
-            ],
-            "time": "2018-08-05T17:53:17+00:00"
+            "description": "PHPStan - PHP Static Analysis Tool",
+            "time": "2019-01-19T20:23:08+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -1814,6 +2605,53 @@
             ],
             "time": "2016-08-06T14:39:51+00:00"
         },
+        {
+            "name": "psr/log",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log.git",
+                "reference": "6c001f1daafa3a3ac1d8ff69ee4db8e799a654dd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/6c001f1daafa3a3ac1d8ff69ee4db8e799a654dd",
+                "reference": "6c001f1daafa3a3ac1d8ff69ee4db8e799a654dd",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Log\\": "Psr/Log/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "homepage": "https://github.com/php-fig/log",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ],
+            "time": "2018-11-20T15:27:04+00:00"
+        },
         {
             "name": "sebastian/code-unit-reverse-lookup",
             "version": "1.0.1",
@@ -2473,6 +3311,195 @@
             ],
             "time": "2018-12-19T23:57:18+00:00"
         },
+        {
+            "name": "symfony/console",
+            "version": "v4.2.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/console.git",
+                "reference": "1f0ad51dfde4da8a6070f06adc58b4e37cbb37a4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/console/zipball/1f0ad51dfde4da8a6070f06adc58b4e37cbb37a4",
+                "reference": "1f0ad51dfde4da8a6070f06adc58b4e37cbb37a4",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1.3",
+                "symfony/contracts": "^1.0",
+                "symfony/polyfill-mbstring": "~1.0"
+            },
+            "conflict": {
+                "symfony/dependency-injection": "<3.4",
+                "symfony/process": "<3.3"
+            },
+            "provide": {
+                "psr/log-implementation": "1.0"
+            },
+            "require-dev": {
+                "psr/log": "~1.0",
+                "symfony/config": "~3.4|~4.0",
+                "symfony/dependency-injection": "~3.4|~4.0",
+                "symfony/event-dispatcher": "~3.4|~4.0",
+                "symfony/lock": "~3.4|~4.0",
+                "symfony/process": "~3.4|~4.0"
+            },
+            "suggest": {
+                "psr/log": "For using the console logger",
+                "symfony/event-dispatcher": "",
+                "symfony/lock": "",
+                "symfony/process": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Console\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Console Component",
+            "homepage": "https://symfony.com",
+            "time": "2019-01-25T14:35:16+00:00"
+        },
+        {
+            "name": "symfony/contracts",
+            "version": "v1.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/contracts.git",
+                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/contracts/zipball/1aa7ab2429c3d594dd70689604b5cf7421254cdf",
+                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1.3"
+            },
+            "require-dev": {
+                "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": "1.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Contracts\\": ""
+                },
+                "exclude-from-classmap": [
+                    "**/Tests/"
+                ]
+            },
+            "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": "A set of abstractions extracted out of the Symfony components",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "time": "2018-12-05T08:06:11+00:00"
+        },
+        {
+            "name": "symfony/finder",
+            "version": "v4.2.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/finder.git",
+                "reference": "ef71816cbb264988bb57fe6a73f610888b9aa70c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/ef71816cbb264988bb57fe6a73f610888b9aa70c",
+                "reference": "ef71816cbb264988bb57fe6a73f610888b9aa70c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Finder\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Finder Component",
+            "homepage": "https://symfony.com",
+            "time": "2019-01-16T20:35:37+00:00"
+        },
         {
             "name": "symfony/polyfill-ctype",
             "version": "v1.10.0",
@@ -2531,6 +3558,65 @@
             ],
             "time": "2018-08-06T14:22:27+00:00"
         },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.10.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "c79c051f5b3a46be09205c73b80b346e4153e494"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/c79c051f5b3a46be09205c73b80b346e4153e494",
+                "reference": "c79c051f5b3a46be09205c73b80b346e4153e494",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-mbstring": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.9-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": "2018-09-21T13:07:52+00:00"
+        },
         {
             "name": "theseer/tokenizer",
             "version": "1.1.0",
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 000000000..98488dc12
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,4 @@
+parameters:
+  level: 7
+  paths:
+    - src/