fix script __toString

Author: andkom

src/Operation.php

@@ -43,7 +43,11 @@ public function __construct(int $code, $data = null, int $size = 0)
      */
     public function __toString(): string
     {
-        return $this->getHumanReadable();
+        try {
+            return $this->getHumanReadable();
+        } catch (\Exception $exception) {
+            return 'Script parse error.';
+        }
     }
 
     /**

src/Script.php

@@ -31,6 +31,14 @@ public function __construct(string $data)
         $this->setData($data);
     }
 
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->getHumanReadable();
+    }
+
     /**
      * @return string
      */