Fix get_roles return type: Dict[str, Role] (instead of List[Role]) (#1904)

Author: FreekDB

libs/labelbox/src/labelbox/client.py

@@ -860,7 +860,7 @@ def _create_project(self, input: _CoreProjectInput) -> Project:
         extra_params = {k: v for k, v in extra_params.items() if v is not None}
         return self._create(Entity.Project, params, extra_params)
 
-    def get_roles(self) -> List[Role]:
+    def get_roles(self) -> Dict[str, Role]:
         """
         Returns:
             Roles: Provides information on available roles within an organization.