Support for Symfony 4 (#143)

Author: Nyholm

composer.json

@@ -15,7 +15,7 @@
     "require": {
         "php": ">=5.6.0",
         "goaop/framework": "^2.0.0",
-        "symfony/finder": "~2.4|~3.0"
+        "symfony/finder": "~2.4|~3.0|~4.0"
     },
     "require-dev": {
         "codeception/base": "~2.1",