Hotfix for Symfony Flex incompatibility with latest composer changes (#257)

symfony.lock

@@ -71,6 +71,9 @@
             "ref": "c1431086fec31f17fbcfe6d6d7e92059458facc1"
         }
     },
+    "doctrine/event-manager": {
+        "version": "v1.0.0"
+    },
     "doctrine/inflector": {
         "version": "v1.3.0"
     },
@@ -86,6 +89,12 @@
     "doctrine/orm": {
         "version": "v2.6.0"
     },
+    "doctrine/persistence": {
+        "version": "v1.0.0"
+    },
+    "doctrine/reflection": {
+        "version": "v1.0.0"
+    },
     "easycorp/easy-log-handler": {
         "version": "1.0",
         "recipe": {
@@ -413,6 +422,9 @@
             "ref": "cda8b550123383d25827705d05a42acf6819fe4e"
         }
     },
+    "symfony/security": {
+        "version": "v4.1.3"
+    },
     "symfony/security-bundle": {
         "version": "3.3",
         "recipe": {