Bump version to 2.4.3

Author: Ocramius

lib/Doctrine/Common/Version.php

@@ -34,7 +34,7 @@ class Version
     /**
      * Current Doctrine Version.
      */
-    const VERSION = '2.4.2';
+    const VERSION = '2.4.3-DEV';
 
     /**
      * Compares a Doctrine version with the current one.