Merge pull request #424 from kitsunet/remove-orm-dependency

TASK: Remove doctrine/orm dependency

As the doctrine classes are only used for type checks in
``instanceof`` and ``is_subclass_of`` and both work with
non existing classes we can drop the dependency on
``doctrine/orm`` in this package.

Neos.Utility.ObjectHandling/composer.json

@@ -8,7 +8,6 @@
     "php": ">=5.5.0"
   },
   "require-dev": {
-    "doctrine/orm": "~2.4.0",
     "phpunit/phpunit": "~4.8 || ~5.2.0"
   },
   "autoload": {

composer.json

@@ -103,8 +103,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "~4.8 || ~5.2.0",
-        "mikey179/vfsstream": "~1.6",
-        "doctrine/orm": "~2.4.0"
+        "mikey179/vfsstream": "~1.6"
     },
     "autoload-dev": {
         "psr-4": {