Merge pull request #6 from dunglas/sf4

Allow Symfony 4

Author: dunglas

composer.json

@@ -9,11 +9,11 @@
     "doctrine/annotations": "^1.0",
     "doctrine/orm": "^2.4.5",
     "doctrine/doctrine-bundle": "^1.6",
-    "phpdocumentor/reflection-docblock": "^3.0",
-    "symfony/asset": "^3.0",
-    "symfony/expression-language": "^3.0",
-    "symfony/security-bundle": "^3.0",
-    "symfony/twig-bundle": "^3.0",
-    "symfony/validator": "^3.0"
+    "phpdocumentor/reflection-docblock": "^3.0 || ^4.0",
+    "symfony/asset": "^3.0 || ^4.0",
+    "symfony/expression-language": "^3.0 || ^4.0",
+    "symfony/security-bundle": "^3.0 || ^4.0",
+    "symfony/twig-bundle": "^3.0 || ^4.0",
+    "symfony/validator": "^3.0 || ^4.0"
   }
 }