Merge pull request #425 from doctrine/feature/proxymanager2-compat

ProxyManager ~2.0 is also compatible with migrations

Author: stof

composer.json

@@ -15,7 +15,7 @@
         "doctrine/dbal": "~2.2",
         "symfony/yaml": "~2.3|~3.0",
         "symfony/console": "~2.3|~3.0",
-        "ocramius/proxy-manager": "^1.0"
+        "ocramius/proxy-manager": "^1.0|^2.0"
     },
     "require-dev": {
         "doctrine/orm": "2.*",