:recycle: a few more p2p mappings

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

@@ -20,10 +20,11 @@ function register_connections_for($type, $from_types) {
 }
 
 function register_all_one_offs() {
-    register_connections_for('object', ['object', 'exhibition', 'guide', 'technique']);
+    register_connections_for('object', ['object', 'exhibition', 'guide', 'technique', 'post']);
     register_connections_for('artist', ['artist', 'object', 'technique']);
     register_connections_for('short', ['technique', 'short', 'object', 'guide', 'technique']);
-    register_connections_for('guide', ['technique']);
+    register_connections_for('technique', ['technique', 'post']);
+    register_connections_for('guide', ['technique', 'exhibition', 'post']);
     register_connections_for('exhibition', ['technique']);
     register_connections_for('event', ['event', 'object', 'guide', 'technique']);
     register_connections_for('episode', ['object', 'episode', 'guide', 'technique']);