feat: make params optional in getByRole method for Frame and Page classes

Author: MrPunyapal

src/Playwright/Frame.php

@@ -116,7 +116,7 @@ public function querySelector(string $selector): ?Element
      *
      * @param  array<string, string|bool>  $params
      */
-    public function getByRole(string $role, array $params): ?Element
+    public function getByRole(string $role, array $params = []): ?Element
     {
         return $this->querySelector(Selector::getByRoleSelector($role, $params));
     }

src/Playwright/Page.php

@@ -133,7 +133,7 @@ public function querySelector(string $selector): ?Element
      *
      * @param  array<string, string|bool>  $params
      */
-    public function getByRole(string $role, array $params): ?Element
+    public function getByRole(string $role, array $params = []): ?Element
     {
         return $this->frame->getByRole($role, $params);
     }