Do not claim PHPCR ODM 2.0 support

Author: wouterj

composer.json

@@ -22,7 +22,7 @@
         "symfony/yaml": "^2.8|^3.0",
         "matthiasnoback/symfony-dependency-injection-test": "~0.6",
         "matthiasnoback/symfony-config-test": "^1.3.1",
-        "doctrine/phpcr-odm": "^1.3|^2.0"
+        "doctrine/phpcr-odm": "^1.3"
     },
     "minimum-stability": "RC",
     "prefer-stable": true,