Add setClient method to customize client parameter

Author: Stichoza

src/GoogleTranslate.php

@@ -150,6 +150,18 @@ public function setUrl(string $url): self
         return $this;
     }
 
+    /**
+     * Set Google Translate client param (webapp, gtx, etc.)
+     *
+     * @param string $client Google Translate client param (webapp, gtx, etc.)
+     * @return GoogleTranslate
+     */
+    public function setClient(string $client): self
+    {
+        $this->urlParams['client'] = $client;
+        return $this;
+    }
+
     /**
      * Set GuzzleHttp client options.
      *