Test dynamic relationships (#1017)

* Test dynamic

* Try/catch relationships

* Update snapshot

* Test output

tests/SnapshotPhpDriver.php

@@ -9,7 +9,7 @@ class SnapshotPhpDriver implements Driver
 {
     public function serialize($data): string
     {
-        return $data;
+        return (string) $data;
     }
 
     public function extension(): string