p2p post related post addition

plugins/cia-post-types/includes/p2p-mappings.php

     register_connections_for('technique', ['technique', 'post', 'publication']);
     register_connections_for('guide', ['technique', 'exhibition', 'post', 'publication']);
     register_connections_for('exhibition', ['technique', 'publication']);
-    register_connections_for('event', ['event', 'object', 'guide', 'technique', 'publication']);
-    register_connections_for('episode', ['object', 'episode', 'guide', 'technique', 'publication']);
+    register_connections_for('event', ['event', 'object', 'post', 'guide', 'technique', 'publication']);
+    register_connections_for('episode', ['episode', 'object', 'guide', 'technique', 'publication']);
+    register_connections_for('post', ['post']);
 }
 
 function all_connection_types() {