Relax minimum doctrine/ORM constraint (#62)

This was raised accidentally in #58.

Author: mpdude

composer.json

@@ -24,7 +24,7 @@
         "doctrine/collections": "^1.0|^2.0",
         "doctrine/dbal": "^2.3|^3.0",
         "doctrine/event-manager": "^1.0|^2.0",
-        "doctrine/orm": "^2.19|^3.0",
+        "doctrine/orm": "^2.13|^3.0",
         "doctrine/persistence": "^1.3.8|^2.1|^3.1",
         "psr/log": "^1.0|^2.0|^3.0",
         "symfony/config": "^5.4|^6.4|^7.0",