Allowing symfony 4.0

Author: cryptiklemur

composer.json

@@ -20,15 +20,15 @@
     "require": {
         "php": "^5.6 || ^7.0",
         "cache/array-adapter": "^1.0",
-        "symfony/framework-bundle": "^2.7 || ^3.0",
-        "symfony/options-resolver": "^2.7 || ^3.0",
+        "symfony/framework-bundle": "^2.7 || ^3.0 || ^4.0",
+        "symfony/options-resolver": "^2.7 || ^3.0 || ^4.0",
         "psr/cache": "^1.0",
         "psr/log": "^1.0",
         "cache/namespaced-cache": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.36 || ^5.5",
-        "symfony/symfony": "^2.7 || ^3.0",
+        "symfony/symfony": "^2.7 || ^3.0 || ^4.0",
         "matthiasnoback/symfony-dependency-injection-test": "^1.0",
         "nyholm/symfony-bundle-test": "^1.2.0",
         "cache/apc-adapter": "^1.0",