Added Symfony 4 compatibility

Author: damienflament

composer.json

@@ -14,23 +14,23 @@
         "doctrine/data-fixtures": "^1.0",
         "doctrine/doctrine-bundle": "^1.0 || ^2.0",
         "doctrine/phpcr-bundle": "^2.0@dev",
-        "doctrine/phpcr-odm": "^1.4 || ^2.0",
-        "friendsofsymfony/jsrouting-bundle": "^1.1",
+        "doctrine/phpcr-odm": "^1.4 || ^2.0@dev",
+        "friendsofsymfony/jsrouting-bundle": "^1.1 || ^2.1",
         "jackalope/jackalope": "^1.1.5",
         "jackalope/jackalope-doctrine-dbal": "^1.1.5",
-        "symfony/browser-kit": "^2.8 || ^3.0",
-        "symfony/console": "^2.8 || ^3.0",
-        "symfony/css-selector": "^2.8 || ^3.0",
-        "symfony/debug": "^2.8 || ^3.0",
-        "symfony/dependency-injection": "^2.8 || ^3.0",
-        "symfony/doctrine-bridge": "^2.8 || ^3.0",
-        "symfony/framework-bundle": "^2.8.1 || ^3.0",
-        "symfony/http-foundation": "^2.8 || ^3.0",
-        "symfony/http-kernel": "^2.8 || ^3.0",
+        "symfony/browser-kit": "^2.8 || ^3.0 || ^4.0",
+        "symfony/console": "^2.8 || ^3.0 || ^4.0",
+        "symfony/css-selector": "^2.8 || ^3.0 || ^4.0",
+        "symfony/debug": "^2.8 || ^3.0 || ^4.0",
+        "symfony/dependency-injection": "^2.8 || ^3.0 || ^4.0",
+        "symfony/doctrine-bridge": "^2.8 || ^3.0 || ^4.0",
+        "symfony/framework-bundle": "^2.8.1 || ^3.0 || ^4.0",
+        "symfony/http-foundation": "^2.8 || ^3.0 || ^4.0",
+        "symfony/http-kernel": "^2.8 || ^3.0 || ^4.0",
         "symfony/monolog-bundle": "^3.1",
-        "symfony/process": "^2.8 || ^3.0",
-        "symfony/security-bundle": "^2.8 || ^3.0",
-        "symfony/twig-bundle": "^2.8 || ^3.0"
+        "symfony/process": "^2.8 || ^3.0 || ^4.0",
+        "symfony/security-bundle": "^2.8 || ^3.0 || ^4.0",
+        "symfony/twig-bundle": "^2.8 || ^3.0 || ^4.0"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "^4.0"