Also check for is_object

Author: fjgarlin

src/BrowserKitDriver.php

@@ -423,7 +423,7 @@ public function setValue(string $xpath, $value)
             return;
         }
 
-        if (\is_array($value) || \is_bool($value)) {
+        if (\is_array($value) || \is_bool($value) || \is_object($value)) {
             throw new DriverException('Textual and file form fields don\'t support array or boolean values');
         }