update requirements in readme

dbu · dbu · commit 0756264bd951 · 2017-01-23T08:39:43.000+01:00
diff --git a/README.md b/README.md
@@ -10,7 +10,8 @@ and licensed under the [MIT License](LICENSE).
 
 ## Requirements
 
-* Symfony 2.8+
+* PHP 5.6 / 7
+* Symfony 2.8 / 3
 * See also the `require` section of [composer.json](composer.json)
 
 ## Documentation
