diff --git a/.travis.yml b/.travis.yml
index 352f1f1..bf404e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 language: php
 
-sudo: false
+sudo: required
+
+dist: trusty
 
 php:
   - 5.6
@@ -15,7 +17,10 @@ before_script:
   - composer install --prefer-source --no-interaction --dev
 
 script:
-  - vendor/bin/phpunit
+  - vendor/bin/phpunit --coverage-clover build/logs/clover.xml
+
+after_script:
+  - vendor/bin/coveralls -v
 
 matrix:
   fast_finish: true
diff --git a/composer.json b/composer.json
index c5db9fe..bf5c5a2 100644
--- a/composer.json
+++ b/composer.json
@@ -24,10 +24,13 @@
         "psr-4": { "ArrayQuery\\Tests\\": "tests/" }
     },
     "require": {
-        "php": "^5.6 || ^7.0"
+        "php": "^5.6 || ^7.0",
+        "doctrine/annotations": "1.2.*",
+        "doctrine/instantiator": "1.0.*"
     },
     "require-dev": {
-        "phpunit/phpunit": "~5.7",
-        "friendsofphp/php-cs-fixer": "^2.3"
+        "phpunit/phpunit": "4.8|^5.0",
+        "friendsofphp/php-cs-fixer": "^2.3",
+        "satooshi/php-coveralls": "dev-master"
     }
 }
diff --git a/composer.lock b/composer.lock
index 56d8bfa..475f858 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,40 +4,39 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "aebda12770593ee336ce42f104ecff30",
-    "packages": [],
-    "packages-dev": [
+    "content-hash": "40a2efaf0df9bd814bf093b5cc7f79aa",
+    "packages": [
         {
             "name": "doctrine/annotations",
-            "version": "v1.5.0",
+            "version": "v1.2.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/annotations.git",
-                "reference": "5beebb01b025c94e93686b7a0ed3edae81fe3e7f"
+                "reference": "f25c8aab83e0c3e976fd7d19875f198ccf2f7535"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/annotations/zipball/5beebb01b025c94e93686b7a0ed3edae81fe3e7f",
-                "reference": "5beebb01b025c94e93686b7a0ed3edae81fe3e7f",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/f25c8aab83e0c3e976fd7d19875f198ccf2f7535",
+                "reference": "f25c8aab83e0c3e976fd7d19875f198ccf2f7535",
                 "shasum": ""
             },
             "require": {
                 "doctrine/lexer": "1.*",
-                "php": "^7.1"
+                "php": ">=5.3.2"
             },
             "require-dev": {
                 "doctrine/cache": "1.*",
-                "phpunit/phpunit": "^5.7"
+                "phpunit/phpunit": "4.*"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.5.x-dev"
+                    "dev-master": "1.3.x-dev"
                 }
             },
             "autoload": {
-                "psr-4": {
-                    "Doctrine\\Common\\Annotations\\": "lib/Doctrine/Common/Annotations"
+                "psr-0": {
+                    "Doctrine\\Common\\Annotations\\": "lib/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -73,36 +72,36 @@
                 "docblock",
                 "parser"
             ],
-            "time": "2017-07-22T10:58:02+00:00"
+            "time": "2015-08-31T12:32:49+00:00"
         },
         {
             "name": "doctrine/instantiator",
-            "version": "1.1.0",
+            "version": "1.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda"
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": ">=5.3,<8.0-DEV"
             },
             "require-dev": {
                 "athletic/athletic": "~0.1.8",
                 "ext-pdo": "*",
                 "ext-phar": "*",
-                "phpunit/phpunit": "^6.2.3",
-                "squizlabs/php_codesniffer": "^3.0.2"
+                "phpunit/phpunit": "~4.0",
+                "squizlabs/php_codesniffer": "~2.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2.x-dev"
+                    "dev-master": "1.0.x-dev"
                 }
             },
             "autoload": {
@@ -127,7 +126,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2017-07-22T11:58:36+00:00"
+            "time": "2015-06-14T21:17:01+00:00"
         },
         {
             "name": "doctrine/lexer",
@@ -182,7 +181,9 @@
                 "parser"
             ],
             "time": "2014-09-09T13:34:57+00:00"
-        },
+        }
+    ],
+    "packages-dev": [
         {
             "name": "friendsofphp/php-cs-fixer",
             "version": "v2.4.0",
@@ -305,6 +306,187 @@
             ],
             "time": "2017-06-20T11:22:48+00:00"
         },
+        {
+            "name": "guzzlehttp/guzzle",
+            "version": "6.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/guzzle.git",
+                "reference": "f4db5a78a5ea468d4831de7f0bf9d9415e348699"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/f4db5a78a5ea468d4831de7f0bf9d9415e348699",
+                "reference": "f4db5a78a5ea468d4831de7f0bf9d9415e348699",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/promises": "^1.0",
+                "guzzlehttp/psr7": "^1.4",
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "ext-curl": "*",
+                "phpunit/phpunit": "^4.0 || ^5.0",
+                "psr/log": "^1.0"
+            },
+            "suggest": {
+                "psr/log": "Required for using the Log middleware"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "6.2-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "src/functions_include.php"
+                ],
+                "psr-4": {
+                    "GuzzleHttp\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle is a PHP HTTP client library",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "client",
+                "curl",
+                "framework",
+                "http",
+                "http client",
+                "rest",
+                "web service"
+            ],
+            "time": "2017-06-22T18:50:49+00:00"
+        },
+        {
+            "name": "guzzlehttp/promises",
+            "version": "v1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/promises.git",
+                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/promises/zipball/a59da6cf61d80060647ff4d3eb2c03a2bc694646",
+                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Promise\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle promises library",
+            "keywords": [
+                "promise"
+            ],
+            "time": "2016-12-20T10:07:11+00:00"
+        },
+        {
+            "name": "guzzlehttp/psr7",
+            "version": "1.4.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/psr7.git",
+                "reference": "f5b8a8512e2b58b0071a7280e39f14f72e05d87c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/f5b8a8512e2b58b0071a7280e39f14f72e05d87c",
+                "reference": "f5b8a8512e2b58b0071a7280e39f14f72e05d87c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0",
+                "psr/http-message": "~1.0"
+            },
+            "provide": {
+                "psr/http-message-implementation": "1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Psr7\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Tobias Schultze",
+                    "homepage": "https://github.com/Tobion"
+                }
+            ],
+            "description": "PSR-7 message implementation that also provides common utility methods",
+            "keywords": [
+                "http",
+                "message",
+                "request",
+                "response",
+                "stream",
+                "uri",
+                "url"
+            ],
+            "time": "2017-03-20T17:10:46+00:00"
+        },
         {
             "name": "myclabs/deep-copy",
             "version": "1.6.1",
@@ -994,6 +1176,56 @@
             ],
             "time": "2017-06-30T09:13:00+00:00"
         },
+        {
+            "name": "psr/http-message",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message.git",
+                "reference": "f6561bf28d520154e4b0ec72be95418abe6d9363"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-message/zipball/f6561bf28d520154e4b0ec72be95418abe6d9363",
+                "reference": "f6561bf28d520154e4b0ec72be95418abe6d9363",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP messages",
+            "homepage": "https://github.com/php-fig/http-message",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "time": "2016-08-06T14:39:51+00:00"
+        },
         {
             "name": "psr/log",
             "version": "1.0.2",
@@ -1041,6 +1273,72 @@
             ],
             "time": "2016-10-10T12:19:37+00:00"
         },
+        {
+            "name": "satooshi/php-coveralls",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/satooshi/php-coveralls.git",
+                "reference": "99799f6dd1a05161cf9df46c3f21eb79c2b90ecc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/satooshi/php-coveralls/zipball/99799f6dd1a05161cf9df46c3f21eb79c2b90ecc",
+                "reference": "99799f6dd1a05161cf9df46c3f21eb79c2b90ecc",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "ext-simplexml": "*",
+                "guzzlehttp/guzzle": "^6.0",
+                "php": "^5.5 || ^7.0",
+                "psr/log": "^1.0",
+                "symfony/config": "^2.1 || ^3.0",
+                "symfony/console": "^2.1 || ^3.0",
+                "symfony/stopwatch": "^2.0 || ^3.0",
+                "symfony/yaml": "^2.0 || ^3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.35 || ^5.4.3"
+            },
+            "suggest": {
+                "symfony/http-kernel": "Allows Symfony integration"
+            },
+            "bin": [
+                "bin/coveralls"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Satooshi\\": "src/Satooshi/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Kitamura Satoshi",
+                    "email": "with.no.parachute@gmail.com",
+                    "homepage": "https://www.facebook.com/satooshi.jp"
+                }
+            ],
+            "description": "PHP client library for Coveralls API",
+            "homepage": "https://github.com/satooshi/php-coveralls",
+            "keywords": [
+                "ci",
+                "coverage",
+                "github",
+                "test"
+            ],
+            "time": "2017-08-07T09:29:08+00:00"
+        },
         {
             "name": "sebastian/code-unit-reverse-lookup",
             "version": "1.0.1",
@@ -1554,6 +1852,68 @@
             "homepage": "https://github.com/sebastianbergmann/version",
             "time": "2016-10-03T07:35:21+00:00"
         },
+        {
+            "name": "symfony/config",
+            "version": "v3.3.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/config.git",
+                "reference": "54ee12b0dd60f294132cabae6f5da9573d2e5297"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/config/zipball/54ee12b0dd60f294132cabae6f5da9573d2e5297",
+                "reference": "54ee12b0dd60f294132cabae6f5da9573d2e5297",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.9",
+                "symfony/filesystem": "~2.8|~3.0"
+            },
+            "conflict": {
+                "symfony/dependency-injection": "<3.3",
+                "symfony/finder": "<3.3"
+            },
+            "require-dev": {
+                "symfony/dependency-injection": "~3.3",
+                "symfony/finder": "~3.3",
+                "symfony/yaml": "~3.0"
+            },
+            "suggest": {
+                "symfony/yaml": "To use the yaml reference dumper"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Config\\": ""
+                },
+                "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 Config Component",
+            "homepage": "https://symfony.com",
+            "time": "2017-07-19T07:37:29+00:00"
+        },
         {
             "name": "symfony/console",
             "version": "v3.3.6",
@@ -2273,7 +2633,9 @@
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": [],
+    "stability-flags": {
+        "satooshi/php-coveralls": 20
+    },
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {